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August 1, 2014

Search: Calculate the amount of heat (in kJ) required to convert 87.5 g of water to steam at 100°C.

Number of results: 36,798

physics
The specific heat capacity of copper is 0.092 calories per gram per degree Celsius. How much heat is required to raise the temperature of a 5 g piece of copper from 0C to 80C?
December 13, 2009 by FALLON

Chemistry
When ice melts, it absorbs 0.33 per gram. How much ice is required to cool a 11.0 drink from 75 to 37, if the heat capacity of the drink is 4.18 ? (Assume that the heat transfer is 100 efficient.)
February 5, 2010 by Al

Physics
Latent heat question: Your car's windshield is covered with a .58 cm thick layer of ice. The ice has an area of 1.6m^2. If the temperature of the ice is -2C, how much heat is required to melt all the ice?
December 1, 2010 by Anonymous

Chemistry
When ice melts, it absorbs 0.33 per gram.How much ice is required to cool a 12.0 drink from 72 to 37, if the heat capacity of the drink is 4.18 ? (Assume that the heat transfer is 100 efficient.)
February 1, 2011 by Kate

Chemistry
How much heat (in kJ) is required to warm 12.0g of ice, initially at -12.0C, to steam at 111.0?C The heat capacity of ice is 2.09J/(g*C) and that of steam is 2.01J/(g*C). I got 5.64 but I did something wrong apparently.
November 15, 2012 by NeedHelp

Physics
In sunlight, which becomes warmer: reading glasses or dark sunglasses? i said reading glasses because the UV waves and infrared resonate on the glass, generating more heat. and dark sunglasses just absorb the heat and convert it into internal energy is this right? plz help me!!
February 14, 2008 by luu

chemistry
Ethyl alcohol (CH3CH2OH) has a heat of fusion of 5.01 kj/mol. How much heat in kj is required to melt 137g of ethyl alcohol.
June 21, 2010 by Kim

10th grade
how much heat does it take to convert 20g of water to steam at 100c?
February 21, 2010 by eunide

Beginner Chemistry
How much heat energy is needed to convert 125.0g of ice from -27.0C to a liquid at 50.0C?
December 19, 2011 by Cha-Ching

chem
vapor enthalpy energies kj/mol 40.66, specific heat capacities j/g degrees c s(s) 2.1, fus 6.01 enthalpy energies kj/mol 6.01 specifi heat j/g degrees c s(1) 4.2, s(g) 2.0 how much energy is needed to convert 64.0 grams of ice at 0.00 degress c to water at 80 degrees c
February 12, 2011 by paula

college chemistry
How much heat is needed to convert 2.00 kg of liquid ammonia at -40.0 oC to its vapor at -11.0 oC? The specific heat of liquid ammonia, NH3 (l), is 4.70 J/g-K and that of the vapor NH3 (g), is 2.20 J/g-K. The enthalpy of vaporization of ammonia is 23.3 kJ/mol and its boiling ...
May 25, 2010 by pamela

chemistry
I have done a titration to find the vitamin c concentration in cabbage. This turned out to be 1.25x10^-4 moles per litre. However, I am required to find the concentration in mg/100g. Can I convert moles per litre to mg/100g or is there another way to calculate it. Please help!!
April 24, 2008 by kelly

Chemistry - please this is urgent
To a calorimeter containing 41.80g of water at 29.95oC, 11.7999 of a salt was added with stirring. As the salt dissolved, the temperature rapidly changed to 37.85oC before slowly returning to room temperature. 1. Calculate the Heat of Solution. Given that the Heat of Formation...
March 14, 2008 by girl who needs help in chemistry right now

Chemistry
A bullet weighing 235 grains is moving at a speed of 2.52 X 10^3 ft/s. Calculate the kinetcic energy of the bullet in joules ahd in calories. One grain equals 0.0648 g. Can someone help me out on this please K. E.= 1/2 mv2 . Convert m to kg Convert ft/sec to meters/second. ...
October 29, 2007 by Lauren

Chemistry I
When ice melts, it absorbs 0.33 kJ per gram. How much ice is required to cool a 24.0 fluid ounce drink from 75F to 35F, if the heat capacity of the drink is 4.18 J/gC? (Assume that the heat transfer is 100% efficient.)
September 15, 2010 by Robbie

Statistics
A pharmaceutical company claims its new medication relieves painful symptoms caused by tension headaches within 15 minutes. To investigate this claim, a local health clinic conducts a study of 45 patients who suffer from chronic tension headaches. Each patient is given ...
March 26, 2013 by Bill

chemistry
the specific heat of water is 4.184 j/g-c(celcius). how much heat is required to raise the temperature of 5.0 g of water by 3.0 c(celcius)?
April 4, 2010 by demond

chemistry
How much heat (in ) is required to warm 11.0 of ice, initially at -13.0, to steam at 111.0? The heat capacity of ice is 2.09 and that of steam is 2.01
January 31, 2012 by Anonymous

Physics
A 0.4 kilogram sample of Aluminum at 115 degrees Celsius is put into a container containing 0.5 kilograms of water at 15 degrees Celsius. Neglecting the small amount of energy absorbed by the container and knowing that the specific heat of Aluminum is 900 kJ/kg*C, and the ...
July 17, 2014 by Anna

Physics
15. A refrigerator weighing 1500 N is to be lifted onto a truck bed that is 1.0 m above the ground. When pushed up a slanting ramp 2.0 m in length a force parallel to the ramp of only 800 N is required to move it at constant velocity. Comparing the work involved in lifting the...
July 8, 2014 by Anonymous

Chemistry
NH4NO3 is frequently used as a fertilizer and in explosive compounds dlta Hf values of this compound nd H20 are -365kJmol-1 and -286kJmol-1 respectively. Calculate the amount of heat released bye the dissociation of 1mol of NH4NO3 according to the following reaction 2NH4NO3--&...
February 21, 2013 by Emma

chemisrty
A 50.0 mL solution of 1.2 M HCl at 24.1C is mixed with 50.0 mL of 1.3 M NaOH, also at 24.1C, in a coffee-cup calorimeter. After the reaction occurs, the temperature of the resulting mixture is 29.8C. The density of the final solution is 1.05 g/mL. Calculate the molar heat of ...
June 18, 2014 by jesse

chem
2 HCl(aq) + Ba(OH)2(aq) BaCl2(aq) + 2 H2O(l) H = -118 kJ Calculate the heat when 112.4 mL of 0.500 M HCl is mixed with 300.0 mL of 0.515 M Ba(OH)2. Assuming that the temperature of both solutions was initially 25.0C and that the final mixture has a mass of 412.4 g and a ...
December 1, 2007 by mel

Chemisry
what mass of protons would be required to just neutralize the charge of 1.0g of electrons? how do I answer this? You know the mass of an electron. Calculate how many are in 1 gram. You will need the same number of protons. Knowing the mass of a proton calculate the number ...
February 8, 2007 by Chris

physics
A 1.3- block of ice is initially at a temperature of -3.5. If 6.6105 of heat are added to the ice, what is the final temperature of the system? Find the amount of ice, if any, that remains. Suppose the amount of heat added to the ice block is doubled. By what factor must the ...
November 22, 2010 by katelyn

physics
The specific heat of pure water at 15 degrees celsius is 4184j/(kg.k). Convert this to kcal/(kg.k). pls help
December 11, 2011 by ted

chemistry
Biosynthesis of proteins from amino acids is an energy driven condensation process (H = + 10 kJ/mol) requiring energy input in the form of ATP. In an experiment, 0.4 mol of amino acids reacted to give a polypeptide and some ATP was consumed. a) explain how biosynthesis of ...
April 13, 2014 by Kev

CHEMISTRY
Biosynthesis of proteins from amino acids is an energy driven condensation process (H = + 10 kJ/mol) requiring energy input in the form of ATP. In an experiment, 0.4 mol of amino acids reacted to give a polypeptide and some ATP was consumed. a) explain how biosynthesis of ...
April 13, 2014 by Abbie1234

Heat Transfer
A hot-wire anemometer is a temperature-based instrument for measuring velocities in a flowing gas. The key component of the device is a very fine wire (diameter = 0.0004 in., length = 0.20 in.) that is electrically heated. The wire is positioned so that the air stream passes ...
August 3, 2012 by Rangen

Chemistry
If 4.168 kJ of heat is added to a calorimeter containing 75.40 g of water, the temperature of the water and the calorimeter increases from 24.58C to 35.82C. Calculate the heat capacity of the calorimeter (in J/C). The specific heat of water is 4.184
June 18, 2014 by Anonymous

Science
For my science class I have to make a machine that attempts to convert heat energy into work. I'm not really sure how to do this, but I do have some ideas, however I'm not all the way there. If you told me your opinion of my ideas or if you gave me one of your ideas that would...
October 15, 2008 by Lynn

chemistry 11
Hi, I am stuck on a couple questions in chemistry 11. The questions are 1. Calculate the number of moles of the anhydrous salt left behind 2. Calculate the number of moles of water removed by heat from your sample of hydrate. 3. Calculate the moles of water per mole of ...
November 22, 2009 by Daniel

chem.
How much heat would be required to warm Earth's oceans by 1.0 degree celsius ? Assume that the volume of Earth's oceans is 137x10^7 km^3 and that the density of seawater is 1.03 g/cm^3. Also assume that the heat capacity of seawater is the same as that of water. Earth's oceans...
February 5, 2010 by Al

Chemistry
Calculate the amount of energy required for the formation of one mole of MgSe bonds (not lattice energy). The radius of the magnesium ion is 0.65 A, and the radius of the selenide ion is 1.98 A. Note that 1 A=10^-10m.
June 17, 2011 by Ashley

Chemistry
Calculate the amount of energy required for the formation of one mole of MgSe bonds (not lattice energy). The radius of the magnesium ion is 0.65 A, and the radius of the selenide ion is 1.98 A. Note that 1 A=10^-10m.
June 17, 2011 by Ashley

Chemistry (How do I calculate)
Calculate the Molar Enthalpy of Neutralization (ΔHn) in kJ/mol of the reaction between a monoprotic acid and a monoprotic base, given the following information: The temperature change equals 6.92C, 50.0 mL of 1.00 M concentration of Acid 50.0 mL of 1.00 M concentration ...
June 28, 2013 by Ashley

chemistry
Global warming refers to the rise in average global temperature due to the increased concentration of certain gases, called greenhouse gases, in our atmosphere. Earth's oceans, because of their high heat capacity, can absorb heat and therefore act to slow down global warming. ...
February 5, 2010 by Al

physics
The amount of heat Q needed to turn a mass m of room temperature T_1 water into steam at 100degrees C T_2 can be found using the specific heat c of water and the heat of vaporization H_v of water at 1 atmosphere of pressure. Suppose that a commercial espresso machine in a ...
November 27, 2008 by Anonymous

Chemistry please help
Suppose that the microwave radiation has a wavelength of 12.4 cm. How many photons are required to heat 255 mL of coffee from 25.0 C to 62.0 C? Assume that the coffee has the same density, 0.997 g/mL, and specific heat capacity, 4.184 J/(g/ K), as water over this temperature ...
November 3, 2008 by Saira

Chemistry
Convert each quantity to an amount in moles: a) 4.27 x 10^21 atoms of He b) 7.39 x 10^23 molecules of ICl
October 20, 2007 by Marty

Math/Physics
I am given a damping constant of 20 dyne*sec/meter...do I need to convert this if the rest of my givens are, for mass = 2kg, k (spring constant) = 82 N/m. I am trying to find the equation of motion of a spring but cannot solve it until I know how to convert/if I need to ...
July 13, 2007 by COFFEE

chem
Consider the following reaction. 2 HCl(aq) + Ba(OH)2(aq) BaCl2(aq) + 2 H2O(l) H = -118 kJ Calculate the heat when 112.4 mL of 0.500 M HCl is mixed with 300.0 mL of 0.515 M Ba(OH)2. Assuming that the temperature of both solutions was initially 25.0C and that the final mixture ...
December 1, 2007 by mel

Chemistry
A chemical reaction is run in which 132 joules of work is done by the system amd the internal energy changes by 469 joules. Calculate the amount of heat transferred. u=q+w I was going to do 469 = q + 132 but I think this is wrong.
January 22, 2012 by Hannah

chemistry
Draw an energy profile describing an exothermic reaction and label the energy activation and change of heat components of the profle. Calculate the change in heat when 6.00g of 2Cl2 are used in the reaction. Change of heat= -118.3 kcal/mol.
March 29, 2010 by amanda

chem
How much heat is required to raise the temperature of 200 g CH3OH from 20 to 30 degrees and then vaporize it at 30 degrees. The molar heat capacity of CH3OH is 81.1 J/Mol/K. Okay...the answer is approximately around 254. It was a homework problem. The question is how do you ...
February 15, 2010 by joseph

Chemistry
When ice melts, it absorbs 0.33 kJ/g. How much ice is required to cool a 11.0oz drink from 76F to 39F, if the heat capacity of the drink is 4.18J/gC ? (Assume that the heat transfer is 100% efficient.) I got 11 g, but I guess that's wrong...
April 4, 2013 by Jordann

surface energy budget
I'm give the following data: Q*, QG, QH, QE for a 24-hour period, i'm required to plot these 4 data on the same graph, which I've already done. I'm also required to compute these 24 hours totals - transfer of sensible heat to the atmomsphere - transfer of latent heat to the ...
October 2, 2006 by Fai

physics
What is the amount of heat entering your skin when it receives the heat released by 26.4 g of steam initially at 100 degrees celsius that cools to 34.3 degrees celsius?
November 29, 2009 by AE

algebra with application
$4,000 at 10% for 20 years (a) Calculate the future amount if the money were invested at simple interest. Calculate the future amount if the money were invested with annual compounding. (Round your answer to the nearest cent.)
November 27, 2011 by Anonymous

Physics
How long would it take a kettle with a 1kW heating element to heat 1 litre of water? Watts = Joules / second Mass of 1 litre of water = 1kg 1 kW = 1 k Joule / second or 1000 joules/ second 1g of water needs 4.184J to raise the temperature by 1̊ c. Water ...
December 15, 2010 by Paul

Finance
$2,000 at 12% for 20 years (a) Calculate the future amount if the money were invested at simple interest (b) Calculate the future amount if the money were invested with annual compounding. (Round your answer to the nearest cent.)
June 2, 2012 by Anonymous

physics
The specific heat capacity of pure water at 15.0 degrees celsius is 4184J/(kg.k). Convert this to kcal/(kg.k). pls help
December 11, 2011 by ted

Chemistry
Consider the following reaction. 2 HCl(aq) + Ba(OH)2(aq) BaCl2(aq) + 2 H2O(l) ΔH = -118 kJ Calculate the heat when 103.6 mL of 0.500 M HCl is mixed with 300.0 mL of 0.550 M Ba(OH)2. Assuming that the temperature of both solutions was initially 25.0C and that the final ...
October 22, 2012 by Bailey

ap chem-3 quest just need 1 answer
A rifle bullet (mass = 1.50 g) is moving with a velocity of 850. mph. What is the wavelength associated with this bullet? Assume your eyes receive a signal consisting of blue light, = 470 nm. The energy of the signal is 2.5 10-14 J. How many photons reach your eyes? You must ...
September 27, 2006 by ash

Chem
The specific heat capacity of aluminum is .89 J/y degrees C. How much heat is required to change the temp of 1500g aluminum pan from 25 degrees C to 100 degrees C?
October 17, 2010 by Emily

Chem
The specific heat capacity of aluminum is .89 J/y degrees C. How much heat is required to change the temp of 1500g aluminum pan from 25 degrees C to 100 degrees C?
October 17, 2010 by Emily

physics
The basal metabolic rate is the rate at which energy is produced in the body when a person is at rest. A 70.0 kg person of height 1.79 m would have a body surface area of approximately 1.90 m^2. What is the net amount of heat this person could radiate per second into a room at...
December 6, 2009 by AE

physicss
A 0.190 kg piece of copper is heated and fashioned into a bracelet. The amount of energy transferred as heat to the copper is 6.62 x 10^4 J. If the specific heat of copper is 387 J/kg x C, what is the change in temp of the copper?
November 1, 2009 by arriell

phys
A 0.190 kg piece of copper is heated and fashioned into a bracelet. The amount of energy transferred as heat to the copper is 6.62 x 10^4 J. If the specific heat of copper is 387 J/kg x C, what is the change in temp of the copper?
November 2, 2009 by abbigail

chemistry
Determine the amount of heat needed to raise 20.0 g of ice at 0 degrees C to steam at 100 degrees C. (ΔHfusion = 334 J/g; Specific heat of (H2O) = 4.18 J/gc; ΔHvap = 2.25 kJ/g)
May 6, 2012 by shae

chemistry
Determine the amount of heat needed to raise 20.0 g of ice at 0 degrees C to steam at 100 degrees C. (ΔHfusion = 334 J/g; Specific heat of (H2O) = 4.18 J/gc; ΔHvap = 2.25 kJ/g)
May 6, 2012 by shae

chem 20
100. G of a metal required 848 calories to be heated from 25 degrees celsius to 100 degrees celsius calculate the specific heat of the metal
September 10, 2013 by Anonymous

Chemistry
If 3.21 g of BeC2O4 * 3H2O is heated to 220 C calculate the volume of the H2O(g) released, measured at 220 C and 735 mm Hg? please help me Convert g BeC2O4*3H2O to mols BeC2O4*3H2O. Convert mols BeC2O4*3H2O to mols H2O. Use PV = nRT to calculate volume of H2O. Post your work ...
April 8, 2007 by Karisa

physical science
How much heat is required to raise the temperature of a 10.0 kg of aluminum by 80 degrees Celsius? Look up the specific heat of aluminum. The units will be Calories/kg*degC or Joules/kg*degC. Multiply that number by the temperature change (80 C) and the mass (10.0 kg). See ...
June 22, 2007 by jan

physics
A snake is sunning itself on a rock. (a) If the snake is 0.3 m long, what is the approximate amount of radiation it absorbs from the sun in 10 minutes? (b) If no heat flows out of the snake via conduction or by evaporative cooling, how much does its temperature increase during...
April 12, 2011 by Sandhya

science
the specific heat capacity of lava is 1600 j kg -1 oC -1. when all the erupted lava cools from the eruption temperture of 1050 oC to 15 oC, the heat released is 15 2x10 j. calculate a value for the total mass of lava that erupted. give your answer in scientific notation. The ...
May 16, 2007 by smartypants

chemisty
Farmers often spray water on plants when there is a chance of frost to protect them from freezing. Calculate the amount of heat released when 100 mL of water at 25oC cools to -2oC. (ΔHfusion water is 6.03 kJ/mol, cwater = 4.18 J/(goC), cice = 2.01 J/(goC))
August 3, 2011 by Vt

chemisty
Farmers often spray water on plants when there is a chance of frost to protect them from freezing. Calculate the amount of heat released when 100 mL of water at 25oC cools to -2oC. (ΔHfusion water is 6.03 kJ/mol, cwater = 4.18 J/(goC), cice = 2.01 J/(goC))
August 3, 2011 by Vt

Chemistry
A gas is allowed to expand at constant temperature from a volume of 2.00 L to 11.20 L against an external pressure of 1.500 atm. If the gas loses 256 J of heat to the surroundings, what are the values of q, w, and ΔU? Pay careful attention to units. -----My attempt: q = ...
October 9, 2012 by Syed

Chemistry
A gas is allowed to expand at constant temperature from a volume of 2.00 L to 11.20 L against an external pressure of 1.500 atm. If the gas loses 256 J of heat to the surroundings, what are the values of q, w, and ΔU? Pay careful attention to units. -----My attempt: q = ...
October 9, 2012 by Syed

chemistry
Suppose that the microwave radiation has a wavelength of 10.8 cm. How many photons are required to heat 215 mL of coffee from 25.0 ^\circ \rm C to 62.0 ^\circ \rm C? Assume that the coffee has the same density, 0.997 g/mL, and specific heat capacity, 4.184 \rm J/(g\cdot K), as...
November 8, 2010 by Dolapo

chemistry
Calculate the percent recovery of copper if: 7.26 g is the initial amount and 8.61 g is the amount recovered?
March 6, 2013 by Anonymous

Chemistry
Consider the process where 1.3 moles of ice, initially at -30.0 C, is heated to 140.0 C at constant pressure of 1.00 atm. The molar heat capacities (Cp) for solid, liquid, and gaseous water (37.5 J K-1 mol-1, 75.3 J K-1 mol-1, 36.4 J K-1 mol-1, respectively) are assumed to be ...
January 30, 2014 by Bryan Josten

Chemistry
Consider the process where 1.3 moles of ice, initially at -30.0 C, is heated to 140.0 C at constant pressure of 1.00 atm. The molar heat capacities (Cp) for solid, liquid, and gaseous water (37.5 J K-1 mol-1, 75.3 J K-1 mol-1, 36.4 J K-1 mol-1, respectively) are assumed to be ...
January 31, 2014 by Bryan Josten

college algebra
A steel drum in the shape of a right circular cylinder is required to have a volume of 100 cubic feet. express the amount of material required to make the drum as a function of the radius r of the cylinder. also how much material is required if the drum is of radius 3 feet?
February 27, 2012 by Carol

math
1:how do you order 3/4 , 7/8 ,and 13/6 from least to greatest. 2:how do you convert 2 2/4 ito an improper fractin. 3:how do you convert 3% into a decimal and how do you convert 4.56 into a percent ... i am in 6th grade by the way and make sure you provide the answer
February 18, 2013 by makiya

chemistry
calculate the energy required to raise the temp. of 170.0 g of silver (specific heat = .24 joules/celsius times grams) from 273K to 301K. I know the equation and I got 1142.4 joules but need to get to 2 sig figs, so I converted it to 1.1 x 10^4 which is right, but it doesn't ...
November 6, 2007 by Avonlea

chemistry
convert the know heat of fusion of water,334j/g to these units. the conversion between calories and joules is 1 cal = 4.184j
June 20, 2013 by y

physics
Which of the following is a True Statement? PLEASE EXPLAIN ANSWER A) It is possible for heat to flow spontaneously from a hot body to a cold one of from a cold one to a hot one, depending on whether or not the process is reversible or irreversible. B) It is impossible to ...
August 6, 2007 by stanbee

Chemistry
A 5.80 g sample of SiH4 and an excess of oxygen were placed in a reaction container surrounded by 3.40 kg of water. The initial temperature of the water was 14.10C. At the end of the reaction, the temperature of the water was 48.90C. Assume the heat was completely absorbed ...
March 8, 2010 by Megan

Solution Preparation
I need help with Writing a Report Purpose: Preparing 0.2 M 250 ml NaOH solution? Equipments and Materials: Equipments: -Balance -Beaker(250ml) -Graduated cylinder Materials: -Pure water -NaOH Procedure: 1)Calculate the required amount of NaOH in gr. 2)Weight calculated amount ...
March 2, 2012 by Rustam

Chemistry
This is a lab I have, but have no clue what to do. Please do out the steps so i can understand. Reactions and Data: NaOH(s)--> Na1+(aq)+ OH1-(aq) (Heat of solution of NaOH) This reaction involves adding solid NaOH to water and watching the temperature change as it dissolves...
December 31, 2011 by Carrie

physics- response to bobpursley
which is false? Consider the following processes: I. Energy flows as heat from a hot object to a colder object II. Work is done on a system and an equivalent amount of energy is rejected as heat by the system III. Energy is absorbed as heat by a system and an equivalent amount...
June 24, 2009 by matt

Chemistry
Can someone please help me with the following? How do I find the specific heat of a metal when the only information I have is a temperature change ( of -73 degrees C) and a mass (of 22.53 grams)? And what is the forumla for specific heat? Thanks in advance! Hmmm...seems like ...
October 12, 2006 by April

Attn: DrBob222
A .326L container holds 0.146g of Ne and an unknown amount of Ar at 30C and the total pressure is 627 mmHg. Calculate the moles of Ar present? (I have calculated temp 308K, pressure is 0.825 atm and moles of Ne are .007) Chem - DrBob222, Wednesday, March 3, 2010 at 3:25pm T ...
March 4, 2010 by Staci

chemistry
a chunk of silver has a heat capacity of 42.8J/degrees celcius and a mass of 181g. calculate the specific heat of silver.
November 16, 2009 by joshua

Physics
A 5.00x10^2-g block of metal absorbs 5016 J of heat when its temperature canges from 20.0 C to 30.0 C. Calculate the specific heat of the metal ..?
March 29, 2011 by Alayna

chemistry
Calculate the heat transferred when a 8 g of iron nail is cooled from 50oC to 18oC. The specific heat of iron is 0.45 J/goC.
December 4, 2011 by Dana

Chemistry
Topic: Sublimation and Fusion How much heat (in kJ) is required to warm 13.0 g of ice, initially at -14.0 C, to steam at 112.0 C? The heat capacity of ice is 2.09 J/g⋅C and that of steam is 2.01 J/g⋅C. Any help on how to start this is really appreciated.
March 29, 2009 by Pete

science
Which of the following would require more energy to heat it from 10C to 20C? a. 200 kg of water b. 200 kg of aluminum c. 100 kg of steel How much heat energy is required to raise the temperature of 20 kilograms of water from 0C to 35C?
February 7, 2013 by edwin

chem
Global warming refers to the rise in average global temperature due to the increased concentration of certain gases, called greenhouse gases, in our atmosphere. Earths oceans, because of their high heat capacity, can absorb heat and therefore act to slow down global warming...
January 24, 2011 by marie

Physics
An unknown substance is found to require a very large amount of heat energy to raise its temperature a single degree. Does it have a high specific heat capacity or a samall specific capacity? Explain
March 3, 2012 by GRISSELL

Chemistry
Calculate the molar heat of neutralization in kj/mol of the reaction between HA and BOH given the following information: The temperature change equals 9C 50mL of 1M concentration of Acid 50ml of 1M concentration of Base Heat Capacity of the calorimeter is 6.5 J/C. Specific ...
June 27, 2011 by Lance

health
Can someone help explain these directions?? For the energy-yielding nutrients,please convert the amount (grams) consumed to calories. This can be done by multiplying the amount of that nutrient consumed by the respective number of calories it provides (protein and ...
June 20, 2014 by Anonymous

accounting
the balance in the prepaid insurance account, before adjustment at the end of the year, is $11,500. journalize the adjusting entry required under each of the following alternatives for determining the amount of the adjustment (a) the amount of insurance expired during the year...
October 1, 2009 by Kisha

Chemistry
Calculate the heat given off when 177 g of copper cools from 155.0 c to 22.0 c. The specific heat capacity of copper is 0.385 j/g c
January 23, 2014 by Andrew

chemistry
When 1662 J of heat energy is added to 45.9 g of hexane, C6H14, the temperature increases by 16.0 C. Calculate the molar heat capacity of C6H14.
October 20, 2012 by ashley

chemistry
When 1219 J of heat energy is added to 40.4 g of ethanol, C2H6O, the temperature increases by 12.3 C. Calculate the molar heat capacity of C2H6O. (In J)
March 27, 2013 by Anonymous

chemistry
When 1988 J of heat energy is added to 47.5 g of hexane, C6H14, the temperature increases by 18.5 C. Calculate the molar heat capacity of C6H14.
April 7, 2013 by zach

Chemistry
A chunk of silver has a heat capacity of 42.8 J/degrees C and a mass of 181g. Calculate the specific heat of silver.
May 19, 2010 by Ralph

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