Wednesday

April 16, 2014

April 16, 2014

Number of results: 93,099

**science**

When 90 kJ is removed from a 2-kg copper bar its temperature drops from 200 degrees celcius to 85 degrees celcius what is the specific heat of the iron?
*Tuesday, March 22, 2011 at 12:10pm by Brenda*

**Physics**

what would be the final temperature when 80kg of 0 degrees C cold water is mixed with 60kg of 40 degrees C warm water. The sum of the heats gained is zero (one of them loses heat, or negative heat gained). Heatgained80 + heatgained60=0 80*c*(Tf-0) + 60*c*(Tf-40)=0 solve for Tf.
*Friday, October 27, 2006 at 3:56pm by Jennifer*

**physical science**

How many joules of heat are required to melt 40kg of ice at o degrees celcius?
*Thursday, October 2, 2008 at 5:36pm by Rosemary*

**chemistry**

What mass of CaCl2(s) must be dissolved in pure water at 10 degrees celsius to make a 26.3 mL solution and to increase the solution temperature to 16.4 degrees celcius? assume solution has same physical properties as water. deltaH of solution = -82.8 kJ/mol specific heat of ...
*Monday, November 17, 2008 at 7:29pm by Anonymous*

**physics**

The specific heat capacity is 1800 J/Kg/K .Calculate the amount of energy liberated when 7kg of the liquid cools from 70 Degrees Celcius to 35 degrees celcius
*Saturday, June 1, 2013 at 2:41pm by zaheer*

**chemistry**

Assume that the pressure is one atmosphere and determine the heat in joules required to produce 3.23 kg of water vapor at 100.0 °C, starting with (a)3.23 kg of water at 100.0 °C and (b)3.23 kg of liquid water at 0.0 °C
*Tuesday, December 14, 2010 at 8:25am by need*

**chem**

How much heat is required to heat 0.1 g of ice at −30 degrees C to steam at 100 degrees C
*Thursday, March 1, 2012 at 5:47pm by sammy *

**physics**

Assume that the pressure is one atmosphere and determine the heat in joules required to produce 3.23 kg of water vapor at 100.0 °C, starting with (a)3.23 kg of water at 100.0 °C and (b)3.23 kg of liquid water at 0.0 °C
*Tuesday, December 14, 2010 at 8:22am by Help*

**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?
*Sunday, October 17, 2010 at 10:06pm 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?
*Sunday, October 17, 2010 at 10:08pm by Emily*

**Science**

1. How much heat energy is lost by 3 kg of water when it cools from 80 degrees C to 10 degrees C? 2. A 300 g piece of aluminum is heated from 30 degrees C to 150 degrees C. What amount of heat energy is absorbed? 3. Determine the temperature change in each of the following. (a...
*Sunday, October 23, 2011 at 12:56am by Debra*

**Chemistry**

A 35.0 g block of copper at 350.0 degrees celcius is added to a beaker containing 525 g of water at 35.0 degrees celcius. What is the final temperature of water?
*Tuesday, November 27, 2012 at 10:27am by Maryam*

**Physics**

Spent steam from an electric generating plant leaves the turbines at 120.0 degrees Celsius and is cooled to 90.0 degrees Celsuius liquid water by water from a cooling tower in a heat exchanger. How much heat is removed by the cooling tower water for each kilogram of spent ...
*Tuesday, November 21, 2006 at 4:37pm by Erica*

**Physics**

How much heat is added to a 10.0 g of ice at -20.0 degrees Celsius to convert it to steam at 120.0 degrees Celsius? compute and add the following heats: heat to heat ice from -20C to 0C heat to melt ice at 0C Heat to heat water from 0 to 100C heat to convert water to steam at ...
*Monday, March 5, 2007 at 7:45pm by Marie*

**chemistry**

the boiling point of water at 735mmHg is 99.073 degrees celcius. What mass of NaCl should be added to 3.11kg water to increase the boiling point to 100.000 degrees celcius? Kb for water = 0.510 K Kg mol-1
*Wednesday, October 6, 2010 at 6:16am by Kell*

**Chemistry. Please help!!**

heat absorbed by ice + heat absorbed by water from melted ice at zero C + heat lost by warm water = 0 [mass ice x heat fusion] + [mass melted ice x specific heat water x (Tfinal-Tinitial)] + [mass warm water x specific heat water x (Tfinal-Tinitial)] = 0 Solve for Tfinal, the ...
*Friday, March 2, 2012 at 4:15pm by DrBob222*

**chemistry**

A 94.7 g sample of silver (s= 0.237 J/(g x Degree C)), initially at 348.25 Degrees C , is added to an insulated vessel containing 143.6 g of water (s=4.18 J/(g x Degree C)), initially at 13.97 Degrees C. At equilibrium, the finial temperature of the metal-water mixture is 22....
*Wednesday, November 14, 2012 at 9:10pm by marcus *

**physic-heat**

the specific heat of water is one of the highest of all substances.why does this make water a useful liquid to use in hot water bottles? and could you use a lump of nickel to warm your bed instead of a hot water bottle?which would be better? why? I will be happy to crititque ...
*Sunday, April 8, 2007 at 10:04am by Pauline*

**Chemisrty**

what is the molality of a 0.075m of ethyl alcohol in water at 25 degrees celcius. Assume the density of the solution at such low concentration is equal to that of water at 25 degrees celcius, 0.997g/ml
*Sunday, February 13, 2011 at 4:01pm by Kate*

**Chemistry**

which of the following quantities is not required to calculate the amount of heat energy required to heat water from 25^OC to 55^OC? A-the mass of water sample. B-the initial temp. C-the heat of vaporization for water. D-the final temp. E-the specific heat of water.
*Friday, July 15, 2011 at 3:12am by John Height*

**science**

jay heated 120mL of water that was 20 degrees celsius to 80 degrees celsius. a)how much did the temperature of water change? b) how much heat did jay add to the water? c) if jay used a liquid that was not water, the specific heat would not equal:(circle best answer) 0cal/g/...
*Sunday, October 14, 2012 at 1:20pm by Johna *

**Lauren**

The specific heat of water is at 4.184J/g * degree C. How much heat is evolved, or absorbed, when the temperature of 9.00 mol of liquid water cools from 38 degrees C to 28 degrees C? How do I start this problem
*Friday, November 16, 2007 at 6:37pm by Chemistry*

**Heat Energy**

1. (a) 500g of copper is heated from 30 degree celcius - 120 degree celcius?. (b) if the same quantity of heat is supplied to 300g of water initial at 30 degree celcius,what will be the final temperature.
*Tuesday, March 19, 2013 at 2:43pm by Precious*

**Chemistry**

How much heat did the water lose in going from 45 to 19.5 degrees? Mass x specific heat water x (Tfinal-Tinitial). How much heat did the ice gain? mass ice x heat fusion. heat lost + heat gain = 0. The only unknown is mass ice.
*Friday, April 23, 2010 at 5:57pm by DrBob222*

**chemistry**

How much heat energy in KJ is evolved by a reaction in a calorimeter in which the temperature of the calorimeter and water increases from 20.91 degrees C to 26.45 degrees C? The bomb has a heat capacity of 469 J/degrees . The Calorimeter contaains 792 grams of water.
*Wednesday, December 8, 2010 at 6:45pm by Brittany*

**physics**

0.2 kg of ice at 0 degrees celcius is mixed with 500g of water at 25 degrees celcius. What is the resulting temperature?
*Tuesday, June 22, 2010 at 7:54am by Gibbons*

**Chemistry**

How many grams of ice are needed to cool 250 ml of water from 75 degrees celcius to 5 degrees celcius?
*Tuesday, April 12, 2011 at 12:20am by Thao*

**chemistry**

How much heat is required to convert 0.4 kilograms of ice at 0 degrees celsius to water at the same temperature?
*Tuesday, March 1, 2011 at 3:51pm by Anonymous*

**chem**

how much heat is required to vaporize 34.8g of water at 100 degrees celcious?
*Friday, November 16, 2012 at 12:46pm by law-rece*

**Physics 11th Grade "HEAT' 2**

1) Emily is testing her baby's bath water and finds that is too cold,so she adds some hot water from kettle on the stove. If Emily adds 2.00 kg of water at 80.0 degree celcius to 20.0 kg of bath water at 27.0 degree celcius , what is the final temperature of the bath water? 2...
*Thursday, March 14, 2013 at 11:09am by Isis*

**Math**

An object is heated to 90 degrees Celcius and is then allowed to cool in a room whose air temperature is 25 degrees celcius. If the temperature of the object is 75 degrees celcius after 10 minutes, when will its temperature be 50 degrees celcius?
*Monday, November 22, 2010 at 9:57pm by Hannah*

**Excel Problem**

heat lost by hot water + heat gained by cold water = 0 initial volume = 3000 L 30 L/min x 5 min = 150L [mass cold water x specific heat x (Tfinal-Tinitial)] + [mass warm water x specific heat x (Tfinal-Tinitial)] = 0 You know mass cold water (150L = 150kg You know specific ...
*Sunday, September 18, 2011 at 11:42pm by DrBob222*

**Heat energy**

CORRECTION (a). 500g of copper is heated from 30 degree celcius to 120 degree celcius, what is the quantity of heat supplied?(b). If the same quantity of heat is supplied to 300g of water initial at 30 degree celcius. What will be the final temperature.
*Tuesday, March 19, 2013 at 4:02pm by Precious*

**Chemistry**

How much energy (heat) is required to convert 248 g of water from 0oC to 154oC? Assume that the water begins as a liquid, that the specific heat of water is 4.184 J/g.oC over the entire liquid range, that the specific heat of steam is 1.99 J/g.oC, and the heat of vaporization ...
*Tuesday, September 16, 2008 at 9:02pm by Jimmy*

**Chem**

How much energy (heat) is required to convert 248 g of water from 0oC to 154oC? Assume that the water begins as a liquid, that the specific heat of water is 4.184 J/g.oC over the entire liquid range, that the specific heat of steam is 1.99 J/g.oC, and the heat of vaporization ...
*Saturday, February 4, 2012 at 9:46pm by Dan *

**chemistry**

heat absorbed by cool water + heat lost by warm water = 0 [mass cool water x specific heat water x (Tfinal-Tinitial)] + [mass warm water x specific heat water x (Tfinal-Tinitial)] = 0 Solve for Tfinal.
*Friday, April 27, 2012 at 10:31pm by DrBob222*

**chem**

The solubility of KNO3 is 155 g per 100 g of water at 75 degrees celcius and 38.0 g at 25 degrees celcius. What mass (in grams) of KNO3 will crystallize out of solution if exactly 100 g of its saturated solution at 75 degrees celcius is cooled to 25 degrees celcius. i found ...
*Wednesday, October 15, 2008 at 8:04pm by Mischa*

**Chemistry**

1. How much heat is absorbed when 63.7g H(small 2)O [water](l) at 100 degrees C and 101.3 kPa is converted to steam at 100 degrees C? Express your answer in kJ. Is there an equation? 2.How much heat (in kJ) is released when 0.677 mol NaOH(s) is dissolved in water? (Steps?) ...
*Wednesday, May 12, 2010 at 4:17pm by Anonymous*

**Chemistry**

A 45-kg sample of water absorbs 345 kJ of heat. If the water was initially at 22.1 degrees celcius, what was the final temperature?
*Sunday, September 30, 2012 at 10:45pm by Anonymous *

**chemistry**

What quantity of heat is required to warm 53.7 g of liquid water from 0°C to 100°C?
*Monday, March 29, 2010 at 11:14pm by rachel*

**Chemistry**

Given: solubility (g/100g H2O) temp degrees celcius KBR 20 65 40 80 60 90 80 100 100 110 A solution containing 10.5g of KBr in 10g of H2O at 100 degrees celcius is cooled to 40 degrees celcius. A)calculate the g/100g H2O of KBr B)is the solution saturated at 100 degrees ...
*Wednesday, May 11, 2011 at 7:57pm by Curlyqty*

**Chemistry**

How many joules of heat are lost by 3399kg granite as it cools from 41.7 degrees Celcius to -13.3 degrees Celcius? answer must be in joules not kJ
*Wednesday, May 19, 2010 at 10:08am by Ev*

**Chemistry**

7750 J of energy is added to a 325g stone at 24.0 degrees celcius. The temperature increases by 75.0 degrees celcius. What is the specific heat of the stone?
*Tuesday, November 27, 2012 at 10:24am by Maryam*

**physics**

I will be happy to critique your thinking. Add the following heats: heat to melt ice heat to warm water to 100C heat to change water to steam heat to heat steam to 150C
*Thursday, April 21, 2011 at 12:39am by bobpursley*

**Physical Science**

if you mix hot and cold water and get warm water the entropy is higher, even if the energy did not change. The availability of that energy is what changed. Between a glass of hot water and a glass of cold water you can run an engine. However there is not much you can do with a...
*Monday, March 17, 2014 at 12:34pm by Damon*

**AP Chemistry**

The heat of reaction for burning 1 mole of a certain compound X is known to be -477.7 kJ. The calorimeter constant of the bomb being used is 2500 j/degree celsius and the initial temperature of the water is 23.2 degrees celsius. a) if 22.54 g of compound X (MM=46.0) is burned ...
*Monday, February 15, 2010 at 3:01pm by Jacob*

**math 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. Earth¡¯s oceans, because of their high heat capacity, can absorb heat and therefore act to slow down global warming...
*Monday, January 24, 2011 at 11:36pm by Anonymous*

**Math**

An object is heated to 90 degrees Celcius and is then allowed to cool in a room whose air temperature is 25 degrees celcius. If the temperature of the object is 75 degrees celcius after 10 minutes, when will its temperature be 50 degrees celcius? I have no idea how to do this...
*Sunday, November 21, 2010 at 11:47am by Hannah*

**Math**

An object is heated to 90 degrees Celcius and is then allowed to cool in a room whose air temperature is 25 degrees celcius. If the temperature of the object is 75 degrees celcius after 10 minutes, when will its temperature be 50 degrees celcius? I have no idea how to do this...
*Sunday, November 21, 2010 at 4:57pm by Hannah*

**Chemistry 1150**

heat lost by warm water + heat gained by cool water = 0 [mass warm water x specific heat water x (Tfinal-Tinitial)] + [mass cool H2O x specific heat H2O x (Tfinal-Tinitial)] = 0 Solve for Tfinal. Watch the units.
*Tuesday, February 25, 2014 at 9:14pm by DrBob222*

**biology**

between 5 degrees celcius and ten degrees celcius, which solute shows the greatest change in the amount that can be dissolved in 100 grams of water?
*Sunday, October 10, 2010 at 12:47pm by Anonymous*

**Chemistry**

calculate the enthalpy change in delta H foor heating 250 grams of liquid water from 0 degrees celcius to 100 degrees celcius.
*Friday, February 11, 2011 at 7:21pm by Bri*

**algebra**

At a crime scene, police officers find a murder victim in a tub full of warm water. A thermometer shows that the water temperature is 75 degrees F and the air temperature is 70 degrees F. It is known that most people fill a tub with water at 100 degrees F. Find Newton's Law of...
*Wednesday, December 12, 2012 at 10:40am by Andrea*

**Physics**

How many grams of ice must be added to 100 grams of water at 60 degrees so that its temperature drops to 20 degrees celcius? As far as i know I have to use: (Mass)*(specific heat of water) *(finaltemperature - initial temperature = ??
*Thursday, January 7, 2010 at 10:36am by Jose*

**chemistry**

How much heat is required to vaporize 3.50L of at its normal boiling point? The following data are given for Carbon Tetrachloride. Normal melting point, -23 Degrees Celsius, normal boiling point, 77 Degrees Celsius; density of liquid, 1.59g/mL; Delta H (FUSION): 3.28 kJ mol^-1...
*Monday, December 8, 2008 at 3:14pm by Linda*

**chemistry**

How much heat is required to vaporize 3.50L of at its normal boiling point? The following data are given for Carbon Tetrachloride. Normal melting point, -23 Degrees Celsius, normal boiling point, 77 Degrees Celsius; density of liquid, 1.59g/mL; Delta H (FUSION): 3.28 kJ mol^-1...
*Monday, December 8, 2008 at 3:14pm by Linda*

**chemistry**

calculate the energy, in joules and calories required to heat 25.0g of water form 12.5 deg. celcius to 25.7 deg. celcius i know the answer just need to see how to do it especially the calories
*Sunday, January 22, 2012 at 6:58pm by shaun*

**Chemistry**

what is the final temp of the combination when 50 grams of chromium at 15 degrees celcius is added to 25 milliliters of water at 45 degrees celcius?
*Saturday, August 7, 2010 at 10:44pm by Nick*

**Chemistry**

heat gained by cool water + heat lost by warm water = 0 [mass cool water x specific heat x (Tfinal-Tinitial)] + [mass warm water x specific heat x (Tfinal-Tinitial)] = 0 Substitute and solve for Tfinal.
*Friday, November 11, 2011 at 2:30pm by DrBob222*

**chemistry**

heat loss of warm water + heat gained by cool water = 0 [mass warm water x specific heat x (Tfinal-Tinitial)] + [mass cool water x specific heat x (Tfinal-Tinitial)] = 0 Substitute and solve for Tfinal.
*Sunday, April 21, 2013 at 10:55pm by DrBob222*

**chemistry**

The particles of which sample of LiCl(s) have the same average kinetic energy as the particles in a 2.0 mole sample of NH3(g) at 25 degrees celcius? a) 1.0 mole @ 75 degrees celcius b) 12.0 mole @ 50 degrees celcius c) 3.0 mole @ 25 degrees celcius d) 4.0 mole @ 0 degrees celcius
*Saturday, May 15, 2010 at 10:58pm by Anonymous*

**chemistry**

Propane gas is used to heat a tank of water. If the tank contains 200 L of water, what mass of propane will be required to raise its temperature from 20 degrees C to 65 degrees C. The heat of combustion for propane is -2220 kJ/mol.
*Thursday, November 4, 2010 at 10:01pm by Ray*

**Chem 103**

a piece of gold is heated to 100 degrees celsius. A piece of copper is chilled in an ice bath to 0 degrees celsius. Both pieces of metal are placed in a beaker containing 150 g of water at 20 degrees celcius. Will the temperature of the water be greater than or less than 20 ...
*Monday, April 15, 2013 at 12:49pm by Anonymous*

**Chemistry**

How much heat is required to raise the temperature of a 65-g sample of water from 32 degrees celsius to 65 degrees celsius
*Saturday, February 11, 2012 at 10:02pm by Lisa*

**Chem.**

Ethanol has a heat of vaporization of 38.56 KJ/Mol. And a normal boiling point of 78.4 degrees celcius. WHAT is the vapor pressure of ethanol at 18 degrees celcius??
*Wednesday, February 10, 2010 at 3:49am by Joseph*

**chemistry**

correction= The vapor pressure of dichloromethane,ch2, cl2 at 0 degrees celcius is 134mmhg . The normal boiling point of dichloromethane is 40.degrees celcius. Calculate its molar heat of vaporization
*Wednesday, January 20, 2010 at 7:12pm by aamani*

**Chemistry**

How much energy would be needed to turn 183.7 g of Ice at -27 degrees celcius to steam at 135 degrees celcius?
*Friday, November 15, 2013 at 7:41pm by Lindsay*

**Chemistry**

the heat of fusion water is 335J/g,the heat of vaporization of water is 2.26kJ/g, the specific heat of water is 4.184J/deg/g. how many grams of ice at 0 degrees could be converted to steam at 100 degrees C by 9,574J
*Friday, April 27, 2012 at 10:15pm by Randy*

**calorimetry**

if 158 grams of silver at a temperature of 98.5 degrees celcius is placed in a styrofoam cup of 85 grams of water at 13 degrees celcius, what would the final temperature of the water be in two minutes
*Wednesday, February 25, 2009 at 4:19pm by moe*

**Chemistry**

What is the molality of a 0.065M solution of ethyl alcohol in water at 25 degrees Celcius? (Assume the density of the solution at such low conentration is equal to that of water at 25 degrees Celcius, 0.997 g./mL)
*Tuesday, March 1, 2011 at 6:47pm by Shai*

**chemistry**

you have 2.0 grams of water at 0 degrees Celcius. how many kilojules of heat will freez it?
*Friday, April 30, 2010 at 12:28am by Anonymous*

**biology**

What happens to proteins dissolved in water when you heat it to 100 degrees celcius?
*Thursday, November 4, 2010 at 8:44am by Anonymous*

**chemistry**

The vapor pressure of dichloromethane, CH_2Cl_2, at 0 degrees celcius is 134 mmHg. The normal boiling point of dichloromethane is 40 degrees celcius. Calculate its molar heat of vaporization (in kJ/mol).
*Sunday, January 31, 2010 at 3:15pm by jack*

**chem**

The specific heat of silver is 0.237 J/goC Its melting point is 961oC . Its heat of fusion is 11 J/g. How much heat (in J) is needed to change 17.5 g of silver from solid at 25oC to liquid at 961oC ? Add the heat required to warm the silver from room temp to the mp. Then add ...
*Tuesday, October 31, 2006 at 7:59pm by mary*

**College Chemistry**

Calculate the heat in joules needed to warm 225g of water from 88.0 degrees Celsius to its boiling point 100.0 degrees Celsius
*Wednesday, October 24, 2012 at 11:35pm by Alex *

**chemistry**

heat gained by cool water + heat lost by warm water + heat lost by calorimeter = 0 [mass cool water x specific heat x (Tfinal-Tinitial)] + [mass warm water x specific heat x (Tfinal-Tinitial)] + Ccal x (Tfinal-Tinitial) = 0 Substitute FIRST, then solve for Ccal.
*Monday, March 26, 2012 at 4:07pm by DrBob222*

**enthalpy change**

The heat required to raise the beaker temperature will be 3/4 as much the second time, becasue of the delta-T rTIO. The heat required to heat the liquid will be higher by a factor (200/250)(2.43/0.67) = 2.90 Calculate the total heat required in the second case. The ratio (heat...
*Sunday, October 10, 2010 at 6:30pm by drwls*

**Chemistry**

I asked my professor and she said when the ice cube melts, it absorbs energy from the water. We can figure out how much energy using the heat of fusion. The water cools down; since we know how much energy it lost, how much mass it has (including the mass of the ice cube, now...
*Friday, April 27, 2012 at 8:06pm by Anonymous*

**Physics**

How much heat, expressed in Kwh, is required to raise the temperature of water in a 20,000 gallon pool by 10 degrees C. ?
*Friday, April 26, 2013 at 2:45pm by Wolter*

**chemistry**

How much heat would be relaesed by the condensation of 5.40g of steam at 100 (degrees)C and the subsequent cooling of the water to 25(degrees)C? [(delta)Hvap=40.7 KJ/mol at 100(degrees)C; Cp for H2O(l) is 4.18Jg-1 (degrees)c-1] A) 12.2 kj B) 18.3 kj C) 12.8 kj D) 13.9 kj E) 23...
*Monday, June 21, 2010 at 12:42pm by Kim*

**Chemistry 106 ch 11**

Calculate the heat released when 73.5 g of steam at 122.0 C is converted to water at 39.0C. Assume that the specific heat of water is 4.184 J/g C, the specific heat of steam is 1.99 J/g C, and change in heat vap =40.79 kJ/mol for water.
*Saturday, February 15, 2014 at 6:23pm by alex*

**Chemistry**

How much heat is required to warm 1.50 kg of sand from 20.0 C to 100.0 C?
*Tuesday, March 20, 2012 at 12:17am by Derek*

**thermochem**

A meal is 8000kJ. If all the energy is converted to heat, how much iced water with a temperature of 0 degrees must a person drink to maintain body temperature of 37 degrees? How do I solve this - using the fact that 1mL water by 1 degree is 4.2Joules? Heat gained by water = ...
*Monday, February 6, 2012 at 4:34pm by Cole*

**Chemistry**

How many joules (J) are needed to increase the temperature of 43.0g of aluminum from 25 degrees celcius to 50 degrees celcius? (Cp of Al=0.90J/g degrees of celcius) I also need the formula, data, and answer.
*Thursday, October 10, 2013 at 11:41pm by Jaret*

**chemistry**

you dissolve x in 175g of water to make a saturated solution at 50 degrees celcius. if the solution is cooled to 10 degrees celcius, how many grams of x settle out? (x=15.0 at 50 degrees)
*Wednesday, October 13, 2010 at 8:11pm by steve *

**Physics - Heat and phase change**

8.94 kJ of energy is available to melt 20 g of ice (initially at 0*C) and subsequently to warm the water. What is the water's final temperature in degrees Celsius?
*Tuesday, March 19, 2013 at 7:47pm by Jos*

**AP Environmental Science**

Consider the following heats, copper: 0.384J/g degrees, glass:0.502J/g degrees, water: 4.18J/g degrees, and lead:0.159J/g. Which substance once warmed, would be more likely to maintain its heat and keep you warm through a long party on a cold night?
*Wednesday, October 10, 2012 at 4:31pm by Becca*

**chemistry**

a 100.00 mL sample of water has an initial temperature of 20.0 degrees C. The water is heated, and after 5 minutes its temperature is 50 degrees C. approximately how much energy was absorbed by the water? (the specific heat of wter is 4.18 J/g. degrees C
*Saturday, September 3, 2011 at 8:12pm by kelly*

**Chemistry**

heat lost by warm water + heat gained by cool water = 0 [mass warm H2O x specific heat H2O x (Tfinal-Tinnitial)] + [mass cool water x specific heat H2O x (Tfinal-Tinitial)] = 0. Solve for Tfinal
*Saturday, February 9, 2013 at 3:35pm by DrBob222*

**Science**

How much energy is released when a 5600-g sample of water cools from 99 degrees C to 28 degrees C. The specific heat capacity of water is 4.18 J/(g*degrees C) Can someone please tell me the steps to do this?
*Tuesday, April 22, 2008 at 12:41am by Amanda*

**Chemistry **

the specific heat of aluminum is 0.900 J/g degrees celsius. how much energy is required to heat 45.0g of aluminum from 20.0 degrees celsius to 50.0 degrees celsius. a. 2840 J b. 810 J c. 1220 J d. 2030 J
*Sunday, October 16, 2011 at 9:15pm by Meg*

**algebra**

At a crime scene, police officers find a murder victim in a tub full of warm water. A thermometer shows that the water temperature is 75 degrees F and the air temperature is 70 degrees F. It is known that most people fill a tub with water at 100 degrees F. Find Newton's Law of...
*Wednesday, December 12, 2012 at 1:18pm by Andrea*

**chemistry**

what mass of steam intially at 130 degree celcius is needed to warm 200 grams of water in a 100 gram container from 20 to 50 degree celcius
*Thursday, January 20, 2011 at 9:04pm by mike*

**physics**

An ice bag containing 0°C ice is much more effective in absorbing heat than one containing the same amount of 0°C water. (a) How much heat in kcal is required to raise the temperature of 0.700 kg of water from 0°C to 27.0°C? (b) How much heat is required to first melt 0.700 kg...
*Friday, July 19, 2013 at 11:03pm by Eric*

**physics**

swimmers often notice that when they start to swim in a still body of water after a hot sunny day the surface water is warm but the deeper water is cold. why this happens?explain. (is it that the heat of the sun can only heat up the surface of the water?) swimmers often feel ...
*Thursday, May 3, 2007 at 6:31am by Pauline*

**physics**

A steam turbine operates between hot and cold reservoir temperatures of 538 degrees celcius and 92.1 degrees celcius respectively. If heat is supplied at a rate of 238 MW, what maximum amount of power could the turbine deliver?
*Saturday, March 27, 2010 at 4:37pm by Mark*

**physics**

Energy required per gram = Q = (heat of vaporization) + (Tboiling - Tinitial)*(specific heat) Compute and compare that quantity for both liquids. For mercury, Q = 65 + 335*0.03 For water Q = 540 + 78*1.0 Water's heat requirement is much higher
*Wednesday, January 25, 2012 at 8:31pm by drwls*

**Science**

heat lost by warm water + heat gained by cool water = 0 [mass warm water x specific heat water x (Tfinal-Tinitial)] + [mass cool H2O x specific heat H2O x (Tfinal-Tinitial)] = 0 Solve for Tfinal.
*Tuesday, February 25, 2014 at 9:04pm by DrBob222*

**AP CHEM**

mass of water = 30g x 18 cubes = 540 g. heat required to lower T of water from 22 to zero is mass x 4.18 x 22 = xx heat required to freeze 540 g water is mass x heat of fusion water = yy heat required to lower T of 540 g ice from zero to -5 is mass x 2.08 x 5 = zz Total heat ...
*Wednesday, January 2, 2008 at 9:12pm by DrBob222*

**Science**

If you wish to warm 100 kg of water by 20° C for your bath, show that 8370 kJ of heat is required.?
*Thursday, March 13, 2014 at 6:39am by Reggie*

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