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July 22, 2014

Search: How much heat in kcal must be added to 0.52 kg of water at room temperature (20°C) to raise its temperature to 37°C?

Number of results: 41,147

physics
A 5-kg block of ice is at a temperature of -27 C. How much heat must be added to the ice to produce 5 kg of liquid water with a final temperature of 35 oC?
July 29, 2013 by franko

science
Finishing his ginger ale, Ramesh stands at the party holding his insulated foam cup that has nothing in it but 0.100kg of ice at 0 degree celsius. How much heat must be gained by the ice in order for all of it to melt? How much more heat must be gained to raise the temperature...
January 9, 2012 by Debra

Physics
One liter of water at 47 degree C is used to make iced tea. How much ice at 0 degree C must be added to lower the temperature of the tea to 12 degree C? The specific heat of water is 1 cal/g degree C and latent heat of ice is 79.7 cal/g.
January 19, 2011 by rukia

Chemistry
A weightlifter manages to lift a 133 kg (that's 293 pounds, which sounds much more impressive) weight a distance of 1.4 m. How many kcal of heat energy is equivalent to this lift?
January 15, 2014 by Randall

Physics
A weightlifter manages to lift a 133 kg (that's 293 pounds, which sounds much more impressive) weight a distance of 1.4 m. How many kcal of heat energy is equivalent to this lift?
January 17, 2014 by Randall

physics
How much heat must be added to 0.55 kg of aluminum to change it from a solid at 180C to a liquid at 660C (its melting point)? The latent heat of fusion for aluminum is 4.0x10^5 J/kg. I understand the Equation Q=mc times change it T would that be .55 times 4.0 x 10^5 times (...
December 10, 2010 by maria

chemistry
P4 (s) + 10 Cl2 (g) 4 PCl5 (s) H = -435.2 kcal Based on the reaction shown, which statement is true? A) When 30.97 g P4 (s) react, 435.2 kcal are released. B) When 1 mol P4 (s) reacts, 435.2 kcal are released. C) When 123.88 g P4 (s) react, 435.2 kcal are consumed. D) ...
November 9, 2009 by brandy

chemistry
If 15.0 g of KCl is added to 100.0 g of water at 30.0 C, how much more must be added to saturate the solution?
October 19, 2010 by pinky

Chemistry
If 15.0g of KCL is added to 100.0g of water at 30.0 C, how much more must be added to saturate the solution
September 23, 2012 by Jessica

CHEMISTY!!!!!!!!
If 15.0g of KCL is added to 100.0g of water at 30.0 C, how much more must be added to saturate the solution
September 23, 2012 by JOHN

Physics
Water with a mass of 1000kg leaves a hose at 20oC and is converted by the heat from the fire into steam at 300oC. List the steps needed in order to determine the amount of heat that is added to the water. For each step show the formula that must be used and replace the ...
May 13, 2014 by Roller coaster Q-7

Physics
Water with a mass of 1000kg leaves a hose at 20oC and is converted by the heat from the fire into steam at 300oC. List the steps needed in order to determine the amount of heat that is added to the water. For each step show the formula that must be used and replace the ...
May 13, 2014 by Water Q-7

chemistry Ap
How much heat must be added to 50.0g of aluminum metal at 25 degrees C to raise its temperature to 125 degrees C? I have about 20 of these left so if you can do this and work it out and show me how you did it it would be great so I can use it as a guide for the next 19. Thanks.
February 8, 2008 by mhaidar9108

Heat Transfer
A metal storage tank of external area 0.5 m^2 contains water at 65 degree C. & is located inside a large enclosure with wall at 10 deg.C. the tank is painted black on the outside & its emissivity is approx. to 0.95. How much reduction in heat loss would occur if the outside ...
August 1, 2012 by Dhilsath

Physics -- HELP PLEASE
. Water with a mass of 1000kg leaves a hose at 20oC and is converted by the heat from the fire into steam at 300oC. List the steps needed in order to determine the amount of heat that is added to the water. For each step show the formula that must be used and replace the ...
May 13, 2014 by Anonymous

college
A quantity of ice at 0C is added to 65.0 g of water in a glass at 55C. After the ice melted, the temperature of the water in the glass was 15C. How much ice was added? The heat of fusion of water is 6.01 kJ/mol and the specific heat is 4.18 J/(gC).
July 14, 2010 by Anonymous

chemistry
If 50g NaNO(3) is added to 100g water at 10 degrees C, how much more must be added to saturate the solution?
October 28, 2008 by Monica

chemistry
the heat of this reaction,Na + 1/2 Cl 2 NaCl, is 98.3 kcal/mole what is the heat given off two moles of NaCl are formed ?
October 21, 2010 by u wish

College Chemistry
1. What is the change in internal energy (in J) of a system that absorbs 0.677 kJ of heat from its surroundings and has 0.438 kcal of work done on it? 2. A 30.5 g sample of an alloy at 94.0C is placed into 48.7 g water at 20.3C in an insulated coffee cup. The heat capacity ...
October 20, 2010 by Nevaeh

Chemistry
A quantity of ice at 0.0 degrees C was added to 33.6 of water at 21.0 degree C to give water at 0.0 degrees C. How much ice was added? The heat of fusion of water is 6.01 kJ/mol and the specific heat is 4.18 J/(g * degrees C)
February 1, 2008 by Lauren

chemistry
When 47.5J of heat are added to 13.2 g of liquid, its temperature rises by 1.72 degrees C. What is the heat capacity of the liquid? A cook wants to heat 1.35kg of water from 32.0 degrees C to 100 degrees C. If he uses combustion of natural gas to heat the water, hou much ...
September 21, 2012 by Alyssa

Chemistry
3 N2H4(g)+N2O4(g) 4 N2(g) + 4H2O(g) + 2 H2(g) ∆H= -1310 kJ (-312 kcal) How much energy is produced per mole of hydrazine burned? a. 13.6 kJ (3.25kcal) b. 40.9 kJ (9.75kcal) c. 437 kJ (104kcal) d. 1310 kJ (312 kcal)
August 13, 2012 by Patsy

chemistry calorimetry
how can i get the mass of a liquid when i'm given the heat enrgy that is added, and the specific heat of the liquid to which is added, plus the increase in temperature. q = mass x specific heat x (Tf - Ti) q is heat in Joules. mass in grams specific heat in J/g*C Tf = final T ...
January 18, 2007 by claudia

physics
A granite column in a building is 8.50 m high and has a mass of 2.16 multiplied by 104 kg. (a) How much heat (J) is needed to increase its temperature by 10.5C, given its specific heat is 0.200 kcal/kgC? (b) What is its change in length (m) if its coefficient of linear ...
July 24, 2013 by Alice

Chemistry
a. Calculate the delta H, delta G, and equilibrium constant for the reaction of methane with Cl2 to give CH3Cl and HCl. Use the following information for your calculations: Bond Dissociation Energies: CH3-H (104.8kcal/mol), Cl-Cl(59.0 kcal/mol), CH3-Cl(85.0 kcal/mol), and H-Cl...
October 30, 2011 by Jennifer

Physics
Please someone help me out I'm so confused! A system consists of 2.0mol of an ideal monatomic gas at 375 K . How much heat must be added to the system to double its internal energy (a)at constant pressure or (b)at constant volume.
December 10, 2009 by Franky

Chemistry
What is the minimum amount of ice (at 0 degress C) that must be added to 250mL of water at 23 degrees C in order to cool it to 0 degrees celsius? (Density of water= .98 g/cm^3; heat of fusion= 333J/g; heat capacity of water= 4.184J/g C; and heat capacity of ice= 1.86 J/g C)
April 3, 2011 by Kayla

Chemistry
A swimming pool 20.0m *12.5 is filled with water to a depth of 3.5m. if the initial temperature of water is 18.4C how much heat must be added to the water to raise its temperature to 29.0C? Assume that the density of water is 1.000g/mL
February 21, 2010 by Anonymous

chemistry
A swimming pool, 20.0 m 12.5 m, is filled with water to a depth of 3.73 m. If the initial temperature of the water is 17.7C, how much heat must be added to the water to raise its temperature to 28.7C? Assume that the density of water is 1.000 g/mL.
March 26, 2011 by nicole

Chemistry
A swimming pool, 20.0 m 12.5 m, is filled with water to a depth of 3.73 m. If the initial temperature of the water is 18.5C, how much heat must be added to the water to raise its temperature to 28.5C? Assume that the density of water is 1.000 g/mL.
March 27, 2013 by Chuck

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

chemistry 101
How much alcohol must be burned to generate 279kj of heat to warm the water as described in problem 3? (60F to 180F) I've seen where they say the answer is (mass of alcohol)(heat ofcombustion)=279 and you solve for mass. However how am I to know which heat of combustion to use...
April 15, 2012 by Anonymous

Chemistry
(a) A 102-g sample of water is placed in an insulated container and allowed to come to room temperature at 21C. To heat the water sample to 41C, how much heat must you add to it? kJ (b) Consider the hypothetical reaction, being run in an insulated container that contains 102...
June 7, 2011 by Lance

Chemisty
LEAD IS A SOFT, DENSE METAL WITH A SPECIFIC HEAT OF 0.028KCAL/KGC, A MELTING POINT OF 328.0C, AND A HEAT FUSION OF5.5KCAL/KG. HOW MUCH HEAT MUST BE PROVIDED TO MELT A 250.0KG SAMPLE OF LEAD WITH A TEMPERATURE OF 20.0C?
October 23, 2008 by Jessica

Chemistry
Assume a piece of hot metal is added to a calorimeter containing 50mL of water at 22C. The amount of heat released by the metal was determined to be 1000J, and the equilibrium temperature in the calorimeter was 26C. Remembering that the specific heat of water is 4.18 J/gC, how...
June 27, 2011 by Lance

Chemistry
Assume a piece of hot metal is added to a calorimeter containing 50mL of water at 22C. The amount of heat released by the metal was determined to be 1000J, and the equilibrium temperature in the calorimeter was 26C. Remembering that the specific heat of water is 4.18 J/gC, how...
June 27, 2011 by Lance

physics
The label on a soft drink states that 11 fl. oz (325 g) provides 285 kcal. The drink is cooled to 12.0C before it is consumed. It then reaches body temperature of 37C. Find the net energy content of the drink. (Hint: You can treat the soft drink as being identical to water ...
July 23, 2012 by Bruce

Physics
The latent heat of fusion of alcohol is 50 kcal/kg and its melting point is -54oC. It has a specific heat of 0.60 in its liquid state. Calculate the energy needed to melt 2.0 kg of solid alcohol at -54o and raise it to a temperature of -4C.
June 18, 2013 by Isis

had
A 0.106 kg ice cube is taken out of a freezer with temperature -16C. It is then added to a glass of water with mass 0.25 kg. The water initially has a temperature of 24.2 C. Assume no heat is added or lost to the surroundings. Calculate the amount heat required to completely...
March 3, 2014 by Anonymous

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
What is the heat capacity of 20.0 kg of silver? kcal/K
April 21, 2010 by maxie j

Chemistry
A person falls in water at 0 C. After 30 min in the water, he/she suffers from hypothermia, as their body temp drops to 30 C. Since we are water.... we assume the heat capacity is 4.18 J/g/C. 180 Kcal of energy is required to raise the persons temp to 40 C. I need to find the ...
June 10, 2009 by Dave

science
gold has a specific heat of 0.130j/g. degrees celcuis if 195 joules of heat are added to 15 grans of gold homw much does the tempreature of the gold change
March 1, 2011 by nikita

Physics
Aluminum is melted during the recycling process. (a) How much heat must be transferred to each kilogram of aluminum to bring it to its melting point, 660 degrees C, from room temperature, 20 degrees C? (b) About how many cups of coffee could you make with this much heat?
February 17, 2011 by Heat transfer

chemistry
Question Part Points Submissions Used A swimming pool, 20.0 m ✕ 12.5 m, is filled with water to a depth of 3.85 m. If the initial temperature of the water is 18.9C, how much heat must be added to the water to raise its temperature to 28.7C? Assume that the density of...
March 25, 2014 by D

SCIENCE QUESTION
LEAD IS A SOFT, DENSE METAL WITH A SPECIFIC HEAT OF 0.028KCAL/KGC, A MELTING POINT OF 328.0C, AND A HEAT FUSION OF5.5KCAL/KG. HOW MUCH HEAT MUST BE PROVIDED TO MELT A 250.0KG SAMPLE OF LEAD WITH A TEMPERATURE OF 20.0C? Figure the heat to heat if from 20C to the melting point (...
October 7, 2006 by priscilla

Physical Science
A 100 kg sample of a metal is cooled from 100C to 20C by removing 20 kcal of heat. Calculate the specific heat capacity of the metal.
October 12, 2012 by Anna

Physical Science
A 100 kg sample of a metal is cooled from 100C to 20C by removing 20 kcal of heat. Calculate the specific heat capacity of the metal.
October 12, 2012 by Anna again...help!

Science
a 67 gram chunk of ice (Heat of Fusion = 6.0 kJ/mol) in a beaker immersed in a water bath. To produce just enough heat to melt the ice, how many moles of solid NaOH (Heat of Solution = -445.1 kJ/mol) must be added to this system to just melt the ice. (Moles)
January 27, 2014 by Anonymous

college physics
What is the heat capacity of 20.0 kg of silver? kcal/K
April 18, 2010 by max

Chemistry
Liquid Butane, C4H10, is stored in cylinders to be used as a fuel. Suppose 39.3g of butane gas is removed from a cylinder. How much heat must be provided to vaporize this much gas? The heat of vaporization of butane is 21.3 kJ/mol.
January 31, 2008 by Lauren

Chemistry
Liquid Butane, C4H10, is stored in cylinders to be used as a fuel. Suppose 39.3g of butane gas is removed from a cylinder. How much heat must be provided to vaporize this much gas? The heat of vaporization of butane is 21.3 kJ/mol.
January 31, 2008 by Lauren

Science
A 100 kg sample of a metal is cooled from 100C to 20C by removing 20 kcal of heat. Calculate the specific heat capacity of the metal.
February 5, 2014 by Anonymous

Chemistry
A 0.25g sample of a pretzel is burned. The heat it gives of is used to heat 50.g of water from 18 to 42 degrees C. what is the caloric value of the pretzel in kcal/g? Can someone walk me through step by step?
September 18, 2010 by Jason

college phyics
A system consists of 3.2 mol of the monatomic gas neon (which may be treated as an ideal gas). Initially the system has a temperature of 290 K and a volume of 1.2 m3. Heat is added to this system at constant pressure until the volume triples, then more heat is added at ...
June 29, 2011 by olivia ware

ap chemistry
Carbon monoxide reacts with oxygen to form carbon dioxide by the following reaction: 2CO + O2 yields 2CO2 Delta H for this reaction is -135.28 kcal. If 811.7 kcal is released, how many moles of CO must have reacted? 1). 270.5 mol 2). 40.5 mol 3). 12.0 mol 4). 5.41 mol 5). 16.3...
October 18, 2012 by bob

AP Chemistry
Carbon monoxide reacts with oxygen to form carbon dioxide by the following reaction: 2CO(g) + O2(g) --> 2CO2(g) change in H for this reaction is −135.28 kcal. If 811.7 kcal is released, how many moles of CO must have reacted? 1. 16.3 mol 2. 40.5 mol 3. 12.0 mol 4. 5....
September 29, 2013 by Anonymous

physics
Objects A and B have the same mass of 3.4 kg and are at their melting points. They melt when 4.9 104 J of heat is added to A and when 11 104 J is added to B. (a), (b) Determine the latent heat of fusion for the substance from which each object is made. (c) Find the heat ...
April 24, 2013 by Anonymous

College Chemistry
Given 400.0 g of hot tea at 80.0C, what mass of ice at 0C must bea added to obtain iced tea at 10.0C? The specific heat of water is 4.18 J/(g*C), The specific heat of water is 4.184 kJ/mol.
December 6, 2010 by Ashley

Physics
I have ten problems left on my homework that I need help with. My instructor gives us the answer and we have to write down the steps. So if anyone could help me I would really appreciate it. 1 A steel wire, 150 m long at 10C, has a coefficient of linear expansion of 11 10-6...
December 16, 2010 by Jesse

phys
How many kcal of heat are required to vaporize 25.0 kg of water at 100C?
December 15, 2011 by Dennis

physics
The total volume of a new house is 800 m3. Before the heat is turned on, the air temperature inside is 10C, and the relative humidity is 50%. After the air is warmed to 20C, how much water vapor must be added to the air to make the relative humidity 50%? m = kg
October 24, 2013 by vanessa

Math
A seat to a musical costs $5.50. To that amount must be added a 6% entertainment tax. How much money must you receive in total to give a customer a ticket?
July 3, 2013 by Bria S.

Physics
How many kcal of heat are required to vaporize 25.0kg of water at 100C?
April 2, 2012 by Madison

heat of solution
the heat formation of NH3 is -11.04 Kcal/mole. HOW would you calculate the heat of formation of NH3 in Kj/mole?
June 2, 2010 by Sienna

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 20.0C. (a) water (b) concrete (c) steel (d) mercury
July 19, 2013 by Eric

thermal energy
A hot 0.25-kg piece of iron is placed in a calorimeter containing room temperature water. How much heat is lost by the iron as it cools from 125 degree C to 75 degree C? I must have the given/work and answer also how much heat is gained by the water
December 19, 2011 by faith

Lauren
Convert the following energy units. 905 kJ to J 2970 kcal to kJ 5.21 106 J to kcal
December 5, 2013 by Chemistry

Math
I'm trying to help my nephew with some homework and am hopeless. Please help with these questions: If 180 calories of heat were added to 50 grams of copper, what would the change in temperature be? (specific heat of copper = .09) What would the temperature of the copper be if ...
March 4, 2007 by Diane

physics
134 g of water at 7C is added to ice at 0C. If the final temperature of the system (which you can assume is isolated) is 0C, determine HOW MUCH ICE MELTED. The specific heat of water is 4186 J/kgC. The latent heat of fusion for H2O is 335,000 J/kg.
November 14, 2012 by Joseph

chemistry
A 2.622 g sample of almonds is ignited and used to melt ice in a can. a. If the almond sample melted 15.24g of ice what is the heat produced in Kcal grams of nuts? d.If the heat from the almond sample was used to heat 100mL of water at 0.0 degree centigrade, what would be the ...
October 15, 2012 by Anthony

Physics
In each cycle of its operation, a heat engine expels 6,100 J of energy and performs 1,300 J of mechanical work. (a) How much thermal energy must be added to the engine in each cycle? (J) (b) Find the thermal efficiency of the engine. (%)
November 26, 2012 by Sam

Chemistry
What will be the final temperature if 2000g of copper at 95 degrees loses 10 kcal of heat?
October 15, 2010 by Ray

Chemistry
What will be the final temperature if 2000g of copper at 95 degrees loses 10 kcal of heat?
October 15, 2010 by Kelly

Chemistry
what will be the final temperature if 2000g of copper at 95 degrees loses 10 kcal of heat?
October 19, 2011 by Danielle

physics
How much heat is added to 10.5 g of ice at -20.0C to convert it to steam at 123.5C?
May 26, 2014 by physics

Physics
the pressure is one atmosphere and determine the heat in joules required to produce 5.03 kg of water vapor at 100.0 C, starting with (a) 5.03 kg of water at 100.0 C and (b) 5.03 kg of liquid water at 0.0 C. for part (a) I used the equation Q=mL and L was a given value but I...
November 17, 2006 by Jena

biochemistry
1. Walking consumes approximately 100 kcal/mi. In the hydrolysis of ATP (ATP → ADP + Pi), the reaction that drives the muscle contraction, ΔGo is -7.3 kcal/mol (-30.5 kJ/mol). Calculate how many grams of ATP must be produced to walk a mile. ATP synthesis is coupled...
February 6, 2013 by Blake

chemistry
2.) How much heat must be absorbed at 1357 K to melt a bar of copper (80 * 10 * 12 cm) assume d = 8.93 g/cm^3. The normal boiling point is 1357 K, and heat of fusion is 13.05 KJ/mol.
February 15, 2010 by Andrew

chemistry
My chem book gives me the following Hess' Law example: Mg + 2HCl --> H2 MgCl2 Delta H1 MgO +2HCl --> H2O +MgCl2 Delta H2 H2 + 1/2 O2 --> H2O Delta H3=-68.3kcal The desired reaction is the formation reaction of MgO as follows: MgS +1/2 O2 --> MgO Delta H final= ...
December 6, 2012 by marcus

PHYSICS DUE SOON
In each cycle of its operation, a heat engine expels 6,100 J of energy and performs 1,300 J of mechanical work. (a) How much thermal energy must be added to the engine in each cycle?_____J (b) Find the thermal efficiency of the engine.____%
November 29, 2012 by Ame

physics
A 1.2 kg block of ice is initially at a temperature of -5C. (a) If 5.8 multiplied by 105 J of heat are added to the ice, what is the final temperature of the system? C (b) Suppose the amount of heat added to the ice block is increased by a factor of 3.0. By what factor must ...
November 22, 2008 by lyd

physics
A 1.2 kg block of ice is initially at a temperature of -5C. (a) If 5.8 multiplied by 105 J of heat are added to the ice, what is the final temperature of the system? C (b) Suppose the amount of heat added to the ice block is increased by a factor of 3.0. By what factor must ...
November 22, 2008 by lyd

physics
How many calories of heat must be added to 455 g of steel to raise its temperature from 20 C to 192 C? (Note: csteel = 0.115 cal./g. C.)
May 20, 2013 by help please asap

chemistry
A 2.622 g sample of almond is ignited and used to melt ice in a can. a. if the almond sample melted 15.24g of ice,What is the heat produced in kcal/gram? b. If the heat from the almond sample was used to heat 100.0 mL of water at 0.0 degree centigrade.What would be the final ...
October 14, 2012 by adonis

Science
Can you please help me figure out why evaporation is a cooling process and why becoming a solid is a heating process? evaporation absorbs heat from the environment, thus "cooling" the environment. becoming solid is a heating process as heat is moved from the mass being ...
March 4, 2007 by Michelle

Mathematics Ms Sue help
How many calories of heat must be added to 455 g of steel to raise its temperature from 20 C to 192 C? (Note: csteel = 0.115 cal./g. C.)
May 20, 2013 by adam

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
When 1g of baked potato is burnt in a calorimeter having a heat capacity of 350 J the temperature rises by 10 degrees celsius. determine the heat content of atypical baked potato having amass of 120g. Give your answer in both Kj Kcal.
June 5, 2011 by jonh

Physics
lead melts at 328 degrees C. lead has a heat of fusion of 2.04X10^4 J/kg and a specific heat of 130 J/kgK. how much heat must be removed from 0.50 kg of molten lead (liquid) at 328 degrees C to make it all a solid chunk at 300 degrees C?
November 18, 2010 by Brittany

PHYSCS
Suppose a person metabolizes 2150 kcal/day. a) With a core body temperature of 37.1C and an ambient temperature of 21.3C, what is the maximum (Carnot) efficiency with which the person can perform work? b) If the person could work with that efficiency, at what rate, in watts...
January 6, 2012 by melisa

physics
Suppose a person metabolizes 2250 kcal/day. a) With a core body temperature of 36.9C and an ambient temperature of 21.5C, what is the maximum (Carnot) efficiency with which the person can perform work? b) If the person could work with that efficiency, at what rate, in watts...
December 18, 2012 by helena

College Chem
4. Write the balanced equation for CH4+Cl2_CH2Cl2+HCl6. For the reaction in problem 4, Heat of Reaction = -118.3 kcal/mol. Identify whether this is an exothermic or endothermic reaction. Calculate the Heat of Reaction when 6.00 g of Cl2 are used in the reaction.
March 29, 2010 by Kathleen

Physics
The human brain consumes about 21.3 W of power under normal conditions. (More power may be required during exams...) How long can a candy bar (299 Calories) power the normally functioning brain? Note: The nutritional Calorie is equivalent to 1000 calories, or 1 kcal, as ...
November 6, 2007 by Connie

Chemistry
What is the change in internal energy (in J) of a system that absorbs 0.677 kJ of heat from its surroundings and has 0.438 kcal of work done on it?
October 19, 2010 by Ashley

Chemistry
What is the change in internal energy (in J) of a system that absorbs 0.677 kJ of heat from its surroundings and has 0.438 kcal of work done on it?
October 20, 2010 by Ashley

Chemistry
What is the change in internal energy (in J) of a system that absorbs 0.677 kJ of heat from its surroundings and has 0.438 kcal of work done on it?
October 22, 2010 by Nevaeh

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

Physics
500 calories of heat is added to 2.0 g of water at 80 degrees Celsius. How much steam is produced?
March 3, 2013 by Tyler

weighted averages
How do you do this? a pineapple drink contains 15% pineapple juice. how much pure pineapple juice should be added to 8 quarts of the drink to obtain a mixture containing 50% pineapple juice? Let X be the amount of pure pineapple that you must add, in quarts. The amount of pure...
October 22, 2006 by Em

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