Friday

August 29, 2014

August 29, 2014

Number of results: 13,781

**Chemistry (Insulated Vessel, temperature and vol.)**

Insulated vessel has two compartments separated by a membrane. One side is 1 kg of steam at 400 C and 200 bar. The other side is evacuated. The membrane ruptures filling the entire volume. The final pressure is 100 bar. Determine the final temperature of the steam and the ...
*October 2, 2012 by Simon*

**Physics**

1). A hot iron horseshoe (mass=.40kg), just forged, is dropped into 1.35L of water in a .30kg iron pot initially at 20.0 degrees Celsius. If the final equilibrium temperature is 25.0 degrees Celsius, estimate the initial temperature of the hot horseshoe. 2). A cube of ice is ...
*April 21, 2011 by Emily G.*

**Physics**

55) A 200-g block of copper at a temperature of 90 C is dropped into 400g of water at 27 C. The water is contained in a 300-g glass container. What is the final temperature of the mixture?
*November 30, 2010 by Y0gi*

**Physics**

A 400-g block of copper at a temperature of 85°C is dropped into 300 g of water at 33°C. The water is contained in a 250-g glass container. What is the final temperature of the mixture?
*November 29, 2011 by Seth*

**physics**

How much heat ( In calories)is needed to warm 200 grams of water from an initial temperature of 24 degrees celsits to a final temperature of 84 degrees celsuis
*September 24, 2013 by teresa*

**physics**

A metal ball of mass 1.8 kg with initial temperature of 46.5 C is dropped into a container of 3 kg of water at 15 C. If the final temperature is 22.6 C, what is the specific heat of the metal? c_metal =____ J*kg*C?
*May 4, 2014 by Joseph*

**Chemistry**

The final temperature of a material was 315K and delta T was 15 degrees. What the initial temperature be if the material is being cooled... and also initial temperature if the material is being heat? Please and Thank you.
*March 12, 2012 by CeliaWalker*

**Physics **

Assume that 0.10 mol of argon gas is admitted to an evacuated 50 cm3 container at 20° C. The gas then undergoes isobaric heating to a temperature of 300° C. What is the final pressure of the gas? What is the final volume?
*August 4, 2012 by VW*

**thermodynamics**

Two kilograms of an ideal gas undergoes an isentropic process from 670 KPag and a volume of 0.80 cubic meter to a final volume of 0.51 cubic meter. If constant pressure is 0.5215 and constant volume is 0.3152 KJ/kgK, what are (a) final temperature, (b)final absolute pressure...
*November 29, 2011 by hermie*

**chemistry**

Data collected from the calorimetry of a metal mass of the metal = 110.62g initial temperature of the water in the cup = 23.0 C initial temperature of the metal in the boiling water = 99.02 C final temperature of the metal AND water in the cup=25.54C volume of the water =100....
*June 5, 2010 by coco*

**CHEMISTRY**

A volume of 100ml of h20 is initially at room temperature (22.0c). A chilled steel rod at 2.00C is placed in the water. If the final temperature of the system is 21.2C , what is the mass of the steel bar?
*November 28, 2012 by Anonymous*

**chemistry**

If all the energy obtained from burning 1.23 pounds of propane (fuel value is 11.09 kcal/g) is used to heat 125.0 kg of water at an initial temperature of 21.8 °C, what is the final temperature? Hint: The heat, q, released by burning propane is absorbed by the water. Use the ...
*March 25, 2012 by Yasha*

**Chemistry/Calorimetry**

You buy coffee (200.0 ml) served in a styrofoam cup. You are up late working in a chemistry lab, and want to drink the coffee right away, but at 95.0 degrees C, it is too hot to drink. You like the temperature of your coffee to be 79.0 ± 1.0 degrees C. You decide that the ...
*February 23, 2012 by Jen*

**Science 9**

2.0kg block of iron transfers 180,000j to the atmosphere around it. If its initial temperature was 350 celius what is it's final temperature? If you know the specific heat of iron, you can use Q = mc(delta T).
*December 30, 2006 by Ruby*

**chemistry**

When ice at 0C melts to liquid water at 0C, it absorbs 0.334 kj of heat per gram. Suppose the heat needed to melt 31.5 g of ice is absorbed from the water contained in a glass. If this water has a mass of .210 kg and a temperature of 21.0C, what is the final temperature of the...
*June 24, 2009 by Capacino*

**Physics**

The drawing shows an ideal gas confined to a cylinder by a massless piston that is attached to an ideal spring. Outside the cylinder is a vacuum. The cross-sectional area of the piston is A = 2.50 10-3 m2. The initial pressure, volume, and temperature of the gas are, ...
*November 16, 2011 by Jasmin*

**Physics **

The drawing shows an ideal gas confined to a cylinder by a massless piston that is attached to an ideal spring. Outside the cylinder is a vacuum. The cross-sectional area of the piston is A = 2.50 10-3 m2. The initial pressure, volume, and temperature of the gas are, ...
*November 16, 2011 by Angie*

**chemistry**

Suppose a piece of lead with a mass of 14.9g at a temperature of 92.5c is dropped into an insulated container of water. The mass of water is 165g and its temperature before adding the lead is 20.0c. What is the final temperature of the system? The sum of the heats gained is ...
*March 15, 2007 by Jon*

**chemistry**

60.5 grams of iron at an initial temperature of 87.5 degrees celsius are added to 125 grams of water at an initial temperature of 26.7 degrees celsius. calculate the final temperature of the mixture.
*October 6, 2010 by alexja*

**chemistry**

A diesel engine's piston compresses 16 cm3 of fuel-air mixture into 1 cm3. The pressure changes from 1 atmosphere to 48 atmospheres. If the initial temperature of the gas was 305 K, what was the final temperature?
*November 2, 2011 by Nikoli*

**Chemistry**

A sample of steam with a mass of .550 g and at a temperature of 1 degrees C condenses into an insulated container holding 4.40 g of water at 5.0 degrees C. Assuming that no heat is lost to the surroundings, what will be the final temperature of the mixture?
*January 24, 2012 by Becca*

**chemistry**

A samples with a mass of 35 grams and a temperature of 97.3 degree c is placed into 75.0 g of water at 19.7 degree c. The final temperature is 22.3 degree c, what is the specific heat of the sample?
*January 25, 2011 by Linda*

**Chemistry **

Ok this is my last hope, I totally don't get this question. Suppose you have one beaker of H2O at a certain mass and temperature and another beaker of H2O at a different mass and temperature. You then pour these two beakers into one seperate beaker. How do I figure out the ...
*January 27, 2011 by John *

**physics**

Suppose that 90 g of hot water at a temperature of 75 degrees C is poured into a cavity in a very large block of ice at 0 degrees C. (a) What will be the final temperature of the water in the cavity? (b) What mass of ice must melt in order for the water to cool down to the ...
*April 7, 2011 by sara*

**Phyics**

Three moles of an ideal monatomic gas are at a temperature of 396 K. Then 2438 J of heat is added to the gas, and 897 J of work is done on it. What is the final temperature of the gas?
*November 19, 2013 by Carl*

**Physics**

Three moles of an ideal monatomic gas are at a temperature of 396 K. Then 2438 J of heat is added to the gas, and 897 J of work is done on it. What is the final temperature of the gas?
*November 19, 2013 by Carl*

**Physics**

Three moles of an ideal monatomic gas are at a temperature of 396 K. Then 2438 J of heat is added to the gas, and 897 J of work is done on it. What is the final temperature of the gas?
*November 20, 2013 by Help Please*

**physics**

A metal ball of mass 1.8 kg with initial temperature of 46.5 C is dropped into a container of 3 kg of water at 15 C. If the final temperature is 22.6 C, what is the specific heat of the metal? metal = ____ J/kg*C?
*May 4, 2014 by john*

**Chemistry**

1)Suppose a piece of lead with a mass of 14.9 g at a temperature of 92.5 degrees is dropped into an insulated container of water. The mass of water is 165 g and its temperature before adding the lead is 20.0 degrees. What is the final temperature of the system? 2)What are the ...
*January 7, 2008 by Mike*

**physics please help!**

Suppose that 90 g of hot water at a temperature of 75 degrees C is poured into a cavity in a very large block of ice at 0 degrees C. (a) What will be the final temperature of the water in the cavity? (b) What mass of ice must melt in order for the water to cool down to the ...
*April 8, 2011 by Dan*

**Chemistry**

Ten kilograms of hydrogen gas are mixed with 355 kg of chlorine in a 0.50 mm^3 drum. The two gases react to produce hydrogen chloride. What is the final pressure in the drum if the final temperature is 60 degrees celcius?
*March 13, 2011 by Maria*

**Physical Science**

You submerge 100 grams of steel in 200 grams of water. If the steel has an initial temperature of 80°C and the water has an initial temperature of 10°C, what is the final temperature of the system? The specific heat capacity of the steel is 0.15 cal/g•°C
*October 12, 2012 by Connor*

**Chemistry**

A sample of steam with a mass of 0.550 g and at a temperature of 100 degrees C condenses into an insulated container holding 4.40 g of water at 5.0 degrees C. Assuming that no heat is lost to the surroundings, what will be the final temperature of the mixture?
*January 25, 2012 by Becca*

**stat mech**

how to solve this problem 3. Five moles of an ideal monatomic gas with an initial temperature of 127 °C expand and, in the process, absorb 1200 J of heat and do 2100 J of work. What is the final temperature of the gas?
*June 23, 2014 by acinad*

**Gas Law problems ( Chemistry)**

the initial temperature of a 1l sample of gas is 20c. The pressure is decreased from 720mmhg to 36mmhg and the volume increases to 2.14l. What was the final temperature of the gas?
*March 17, 2013 by Allyson*

**chemistry**

what is the final temperature of amixture containning 25 grams of ice at -20 degree celciusadded to water at room temperature 22oC mass of water is 50g followed the steps given by you but not getting the answer (0degree celsius)
*May 12, 2014 by treasa*

**chemistry**

if you burned a marshmallow with a net mass of 0.8g and you heated 49.1 g of water from an initial temperature of 24C to a final temperature of 28C what is the heat energy per gram of marshmallow? (express your answer in J/g) a. 822 J/g b. 1027 J/g c. 4.184 J/g d. 7210 J/g
*May 10, 2010 by shannon*

**Chemistry**

A block of aluminum with a volume of 98.5 cm3 absorbs 67.4 J of heat. If its initial temperature was 32.5 °C, what is its final temperature? (density of aluminum = 2.70 g/cm3) I do not understand how to get the answer
*February 26, 2013 by Mon*

**Chemistry**

A block of aluminum with a volume of 98.5 cm3 absorbs 67.4 J of heat. If its initial temperature was 32.5 °C, what is its final temperature? (density of aluminum = 2.70 g/cm3) I do not understand how to get the answer
*February 26, 2013 by Mon*

**college**

One mole of oxygen gas is at a pressure of 5.10 atm and a temperature of 32.0°C. (a) If the gas is heated at constant volume until the pressure triples, what is the final temperature?
*February 24, 2010 by Anonymous*

**MAC1045**

What will be the final temperature of the solution in a coffee cup calorimeter if a 50.00 mL sample of 0.250 M HCl(aq) is added to a 50.00 mL sample of 0.250 NaOH(aq). The initial temperature is 19.50 degrees C and the
*April 21, 2011 by Julian*

**Chemistry**

Why is the final temperature of the metal and water mixture closer to the initial temperature of the water than the initial temperature of the metal
*June 2, 2010 by anna*

**Chemistry**

Why is the final temperature of the metal and water mixture closer to the initial temperature of the water than the initial temperature of the metal
*June 2, 2010 by anna*

**Chemistry**

Why is the final temperature of the metal and water mixture closer to the initial temperature of the water than the initial temperature of the metal
*June 2, 2010 by anna*

**chemitry**

A block of aluminum with a volume of 98.5 cm3 absorbs 67.4 J of heat. If its initial temperature was 32.5°C, what is its final temperature? (density of aluminum = 2.70g/cm3)
*September 21, 2012 by Alyssa*

**Physics**

An ice cube having a mass of 50 g and an initial temperature of -20⁰C is place in 400 g of water 30⁰C water. What is the final temperature of the mixture if the effects of the container can be neglected?
*April 19, 2010 by Nina*

**chemistry**

A scuba diver takes a 2.3L balloon from the surface, where the pressure is 1.0atm and the temperature is 37degrees C, to a depth of 35m, where the pressure is 4.5atm and the temperature is 18degrees C.what is the final volume at this depth?
*April 28, 2012 by Jessica*

**chemistry**

A sheet of gold of mass 100g and a teperature of 18.0 degrees is placed flat on a sheet of iron weighing 20g and at a temperature of 55.6 degrees. what is the final temperature of the combined metal.
*February 24, 2014 by moses*

**Chemistry I**

A block of aluminum with a volume of 96.6 cm3 absorbs 66.6 J of heat. If its initial temperature was 32.5 °C, what is its final temperature? (density of aluminum = 2.70 g/cm3
*September 15, 2010 by Robbie *

**chemistry**

what is the initial temperature (in degrees C) of a system that has the pressure decreased by 10 times while the volume increased by 5 times with a final temperature of 150 K? a)27 b)75 c)300 d)-198 e) none of the above Please explain--I need to know how to do this--this is ...
*January 3, 2010 by Coug*

**physics**

Hot water of mass 80g, at a temperature of 100degree celcius is pourd into 30g of water at 30degree celcius. Assuming that no heat is lost, calculate the final temperature
*September 2, 2011 by bright*

**Chemistry**

Can someone check my answer for me... 1)Suppose a piece of lead with a mass of 14.9 g at a temperature of 92.5 degrees is dropped into an insulated container of water. The mass of water is 165 g and its temperature before adding the lead is 20.0 degrees. What is the final ...
*January 8, 2008 by Mike*

**physics**

A copper calorimeter can with mass .100 kg contains .160 kg of water and .018 kg of ice in thermal equilibrium at atmospheric pressure. If .750 kg of lead at a temperature of 255 degrees Celsius is dropped into the can what is the final temperature of the system if no heat is ...
*November 15, 2007 by Jen*

**physics**

A copper calorimeter can with mass 0.202 kg contains 0.185 kg of water and 1.40×10^−2 kg of ice in thermal equilibrium at atmospheric pressure. If 0.900 kg of lead at a temperature of 417 degrees celsius is dropped into the can, what is the final temperature of the ...
*December 5, 2009 by AE*

**Physics**

A copper calorimeter can with mass .100 kg contains .160 kg of water and .018 kg of ice in thermal equilibrium at atmospheric pressure. If .750 kg of lead at a temperature of 255 degrees Celsius is dropped into the can what is the final temperature of the system if no heat is ...
*October 18, 2010 by Katherine*

**working with data**

josephs final averages in science class are shown in the table below. homework % toward final grade-20% average-93 quizzes % toward final grade-20% average-92 tests % toward final grade-40% average-85 final exam % toward final grade-20% average-? what is the minimum score ...
*February 24, 2008 by mike*

**Thermochemistry**

A sample of liquid mercury (mass 58 g and temperature 149.0 C) is poured into 79 g of H2O at 19 C. Calculate the final temperature of the mixture, assuming no heat is lost. The heat capacities of Hg and H2O are 27.98 and 75.33 J/mol/K, respectively.
*December 2, 2011 by LaurenB*

**Chemistry**

Please let me know how I am doing with the following three chemistry questions. 1.A sample of a gas in thermometer has a volume of 135mL at 11 degree celcius.Indicat what temperature(in k and degree celcius)would correspond to the foll.volume: (a)volume:113mL temperature ?? ...
*November 23, 2010 by Cliff*

**Chemistry**

time(s) 30 60 120 180 240 300 420 480 t(*c) 13.8 13.8 13.9 13.1 14.2 14.3 14.5 14.7 14.8 b. if t1= 24.5*c, T2= 1.5*C, tr= 23.6*c, and with the tf obtained from the plot, determine Ccal, in J/*C, if the procedure descrived in the laboratory is followed. 3.when 0.600g of metal ...
*April 14, 2011 by Daniel Medaris*

**science**

A diesel engine's piston compresses 16 cm3 of fuel-air mixture into 1 cm3. The pressure changes from 1 atmosphere to 48 atmospheres. If the initial temperature of the gas was 305 K, what was the final temperature? Note: As long as the units for pressure and volume are the same...
*June 21, 2011 by jasmine*

**Chemistry**

A 35g sample of Fe is dropped into 80g of water at 20 degrees Celsius. What is the final (equilibrium) temperature of the iron/water? This isn't really a chemistry problem. There will be no chemical reaction. It is a heat capacity (physics) problem. Use the specfic heats of ...
*March 19, 2007 by Michelle*

**algebra**

the temperature at Kent is -7 degrees and increasing at 2.5 degrees per hour. The temperatire at row is 19 degrees decreasing at 4 degrees per hour. When will they be the same? and what temperatore? let t = hours running time. -7+2.5t = temperature at Kent at time t. 19-4.0t...
*November 30, 2006 by carl*

**Physics 2 **

An unknown substance has a mass of 0.125 kg and an initial temperature of 98.0°C. The substance is then dropped into a calorimeter made of aluminum containing 0.285 kg of water initially at 30.0°C. The mass of the aluminum container is 0.150 kg, and the temperature of the ...
*September 9, 2013 by Emily*

**chemistry**

95.0 mL of H_2O is initially at room temperature (22 degree C). A chilled steel rod at 2 degree C is placed in the water. If the final temperature of the system is 21.3 degree C, what is the mass of the steel bar?
*October 18, 2010 by Mely*

**Chemistry**

A 300 Calorie donut is used to heat 5.0 kg of water. If the initial temperature of the water is 20 degrees C what will the final temperature of the water be? Assume no heat loss to the surroundings
*March 11, 2009 by Kayla*

**chemistry**

a balloon is filled to a volume of 7.00 x 10 to the second mL at a temperature of 20.0 degrees celcius. the balloon is then cooled at a constant pressure to a temperature of 100 k. what is the final volume of the balloon?
*May 11, 2012 by karen*

**chemistry**

A 10.0 g sample of liquid gallium metal, at its melting point, is added to 50.0g of water. The initital temperature of the water is 24.0 degrees C. If the molar enthalpy of freezing gallium is -5.54 kj/mol, what is the final temperature of the water? Thanks
*November 7, 2010 by Bob*

**physics**

The same amount of heat entering identical masses of different substances produces different temperature changes. Calculate the final temperature when 1.25 kcal of heat enters 1.25 kg of the following, originally at 20.0°C. (a) water (b) concrete (c) steel (d) mercury
*July 19, 2013 by Eric*

**General chem lab**

This involves Enthalpy of Neutralization: A student determined the calorimeter constant of the calorimeter. Using a plotted line. The student added 50ml of cold water to 50 ml of heated water in a Styrofoam cup. The initial temperature of the cold water was 21 degree C, the ...
*March 24, 2007 by Toni*

**(chem) this will make me or break me :(**

1.If the pressure of the gas in a 2.31 L balloon is 0.120 atm and the volume increases to 7.14 L, what will be the final pressure of the air within the balloon? Round to the nearest hundredth. Don't forget the units. 2.At a pressure of 2 atm, hydrogen gas occupies a volume of ...
*May 23, 2013 by ty*

**Chemistry**

When a 77 g piece of metal with a temperature of 88 Degree Celsius is placed into 277 g of water having a temperature of 20 degree Celsius, the final temperature of the metal and water is 23.3 degree Celsius. What must be the specific heat of the metal?
*February 14, 2012 by Mom*

**Chemistry**

When a 77 g piece of metal with a temperature of 88 Degree Celsius is placed into 277 g of water having a temperature of 20 degree Celsius, the final temperature of the metal and water is 23.3 degree Celsius. What must be the specific heat of the metal?
*February 14, 2012 by Mom*

**Chemistry**

When a 77 g piece of metal with a temperature of 88 Degree Celsius is placed into 277 g of water having a temperature of 20 degree Celsius, the final temperature of the metal and water is 23.3 degree Celsius. What must be the specific heat of the metal?
*February 14, 2012 by Mom*

**chem ! help its killing me to :/**

1.If the pressure of the gas in a 2.31 L balloon is 0.120 atm and the volume increases to 7.14 L, what will be the final pressure of the air within the balloon? Round to the nearest hundredth. Don't forget the units. 2.At a pressure of 2 atm, hydrogen gas occupies a volume of ...
*May 23, 2013 by john*

**chemistry**

A 4.90 g nugget of pure gold absorbed 255 J of heat. What was the final temperature of the gold if the initial temperature was 24.0°C? The specific heat of gold is 0.129 J/(g·°C).
*March 24, 2010 by pjl*

**3 grade math**

1- at 12 noon, leslie recorded the temperature as 56F. the temperature had increased by 8F from 10 A.M. the temperature at 8 A.M. was 2F warmer than it was at 10 A.M. what was the temperature at 8 A.M? MY Son write the answer is - 62F 2- the temperature at 6 P.M. was 72F. this...
*February 29, 2012 by dk*

**Physics**

A 10 kg block of ice has a temperature of -13°C. The pressure is one atmosphere. The block absorbs 4.10 106 J of heat. What is the final temperature of the liquid water? I multiplied 10kg by -13 and divided by the heat absored by the block 4.10*10^6 but i can get the right answer
*April 5, 2008 by Chris*

**Thermodynamics**

5 pounds of an ideal gas with R=38.7 and K=1.668 have 300Btu of heat added during a reversible constant pressure change of state, initial temperature=80°F. Determine: a.)the final temperature b.)change of internal energy change of enthalpy change of entropy
*March 6, 2010 by Janus*

**Chemistry. Please help!!**

Calculate the final temperature when a 18.7 gram sample of ice at 0 degrees C is placed into a styrofoam cup containing 113 grams of water at 71.6 degrees C. Assume that there is no loss or gain of heat from the surroundings. Heat of fusion of ice = 333 Jg^-1 Specific heat of ...
*March 2, 2012 by JJ*

**Chemistry**

Tutors: thanks for your help. Is this how this problem is solved ? A sample of Xenon gas at 20degrees celcius and 0.570atm is cooled to a pressure of 0.100atm. If the volume remains constant what is the final temperature in degree celcius? Solution: Using Gay-Lussac's Law to ...
*November 23, 2010 by Cliff*

**Physics-PLEASE ANSWER, it's due soon!**

A copper calorimeter can with mass 0.202 kg contains 0.185 kg of water and 1.40×10^−2 kg of ice in thermal equilibrium at atmospheric pressure. If 0.900 kg of lead at a temperature of 417 degrees celsius is dropped into the can, what is the final temperature of the ...
*December 5, 2009 by AE*

**Chemistry**

A .25 g chunk of sodium metal is cautiously dropped into a mixture of 50g of water and 50 g of ice both at 0 C 2Na(s) + 2h2o(l) -> 2naoh(aq) + H2 Delta H = -368 kj Will the ice melt Assuming the final mixture has a heat capacity of 4.18 J/g C calculate the final ...
*January 15, 2012 by Adriths*

**Chemistry**

A .25 g chunk of sodium metal is cautiously dropped into a mixture of 50g of water and 50 g of ice both at 0 C 2Na(s) + 2h2o(l) -> 2naoh(aq) + H2 Delta H = -368 kj Will the ice melt Assuming the final mixture has a heat capacity of 4.18 J/g C calculate the final ...
*January 16, 2012 by Adriths*

**chemistry**

How much heat is absorbed by a persons hand if 100 grams of liquid water at 100°C is poured on his hand? (Assume the final temperature of the water will be normal body temperature of 37°C
*July 10, 2012 by Anonymous*

**Chemistry**

A quantity of 100 mL of .5M of HCl (aq) is mixed with 100 mL of .5M of NaOH (aq) in a constant pressure calorimeter. The initial temperature of the solutions is 22.30 C and the final temperature of the mixed solution is 25.00 C. What is "q" for solution and "q" for reaction?
*April 8, 2012 by Dante*

**Science**

A 500 mL bottle of water, which is at 25 degrees C, is poured over 120 g of ice at -8 degrees C. What will be the final temperature of the water when all the ice has melted. Assume that container is insulated and does not change temperature.
*January 20, 2010 by Bert*

**Science**

A 500 mL bottle of water, which is at 25 degrees C, is poured over 120 g of ice at -8 degrees C. What will be the final temperature of the water when all the ice has melted. Assume that container is insulated and does not change temperature.
*January 21, 2010 by Bert*

**physical science**

How much heat is absorbed by a persons hand if 100 grams of liquid water at 100°C is poured on his hand? (Assume the final temperature of the water will be normal body temperature of 37°C)
*October 23, 2012 by Holland*

**chemistry**

what is the final temperature of amixture containning 25 grams of ice at -20 degree celciusadded to water at room temperature 22oC mass of water is 50g followed the steps given by you but not getting the answer (0degree celsius) ice at -20 to ice at 0 degree=mcdelta T=25*2.06*...
*May 12, 2014 by treasa*

**CHM**

A sample of gas has an initial volume of 2.4 L at a pressure of 855 mm Hg and a temperature of 298K. If the gas is heated to a temperature of 387 K and expanded to a volume of 4.1 L, what is its final pressure in mm of mercury?
*July 6, 2013 by A*

**College Chemistry**

For each trial, enter the amount of heat lost by the calorimeter, qcalorimeter. Be careful of the algebraic sign here and remember that the change in temperature is equal to the final temperature minus the initial temperature. Report your answer using 4 digits. Note, this is 1...
*April 12, 2013 by Jose*

**physical science**

a 1.0 kg sample of metal with a specific heat of 0.50KJ/kgCis heated to 100.0C and then placed in a 50.0g sample of water at 20.0C. What is the final temperature of the metal and the water? I can't figure this out. Is the answer room temperature???
*November 7, 2007 by nate*

**Chemistry **

Heat energy is added to a 325 g block of nickel, and the temperature increases from 23 degrees celsius to 51 degrees celsius. If the same amount of heat was added to the same mass of water at the same temperature, what would the water's final temperature be?
*September 12, 2013 by Bre*

**Chemistry**

H2 and F2 react according to the following equation, forming HF. H2(g) + F2(g) 2HF(g); H° = –271 kJ If H2(g) and F2(g) were mixed in a thermally insulated vessel, the reaction that occurred would be a. endothermic, and the temperature of the reaction system ...
*July 2, 2013 by Kayla*

**Chemistry**

HELP!!! An unknown metal having a mass of 14.00g is dropped into 11.00mL of water at 20.0 degrees Celcius. The starting temperature of the chunk of metal is 100.0C. The final temperature of the water and metal is 32.5C. What is the specific heat of the metal?
*April 6, 2011 by Marie*

**physics**

A 25-g lead bullet is shot with a speed of 240 m/s into a wooden wall. Assuming that 70% of the kinetic energy is absorbed by the bullet as heat (and 30% by the wall), what is the final temperature of the bullet? (Assume the bullet is initially at room temperature of 20°C.
*July 26, 2012 by lanre*

**Chem**

DrBob222, I got an answer of 33 and 24.23 as the temperature but it is incorrect. I looked at your response to David and unfortunately it did not help me. Would you please take a look at this question and help me out. Thanks. If the heat from burning 5.800 g of C6H6 is added ...
*February 10, 2012 by Akle*

**Chemistry**

A 26.5 g sample of ethylene glycol, a car radiator coolant, loses 675 J of heat. What was the initial temperature of ethylene glycol if the final temperature is 32.5°C (c of ethylene glycol = 2.42 J/gK)? Please help me, I don't even know where to begin!!
*October 18, 2010 by Megan*

**Chemistry**

I am having a horrible time with Enthalpy change. I understand how to find specific heat I believe, but the heat capacity of the vessel is given as 10 J/K. My problem is that my professor did not show us how to work this type of problem, and I desperately need help with it. ...
*July 2, 2010 by Casey*

**physics**

A metal container, which has a mass of 9.4 kg contains 14.2 kg of water. A 1.7-kg piece of the same metal, initially at a temperature of 160.0°C, is dropped into the water. The container and the water initially have a temperature of 15.0°C and the final temperature of the ...
*April 16, 2012 by anonymous *

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