1. Chemistry

    The specfic heat of iron is 0.11cal/g C. The heat of fusion of iron, the heat required to convert iron from a solid to liquid at its melting point, is 63.7cal/g. Iron melts at 1530 C. How much heat must be added to 2g of iron at 25c to completely melt it?

    asked by Dan on March 15, 2013
  2. chemistry

    The specific heat of iron is approximately 0.45 J/g °C. How much heat energy is required to raise a 40 g sample of aluminum from 40 °C to 60 °C?

    asked by esmi on April 4, 2012
  3. chemistry

    The specific heat capacity of iron is 0.45 j/g oC. how many joules of energy are needed to warm 1.3100000000000001 g of iron from 20.00oC to 29.00 oC ?

    asked by paul on October 6, 2018
  4. chemistry

    When 1367 J of heat energy is added to 44.1 g of hexane, C6H14, the temperature increases by 13.7 °C. Calculate the molar heat capacity of C6H14.

    asked by sam on October 27, 2016
  5. physics

    A 920 g empty iron kettle is put on a stove. How much heat in joules must it absorb to raise its temperature form 15.0° C to 93.0° C? (The specific heat for iron is 113 cal/kg · °C.)(1 cal = 4.184 J)

    asked by julie on January 22, 2013
  6. Chemistry

    The overall reaction in a commercial heat pack can be represented as shown below. 4 Fe(s) + 3 O2(g) 2 Fe2O3(s) ΔH = -1652 kJ How much heat is released when 4.00 mol iron is reacted with excess O2? How much heat is released when 1.00 mol Fe2O3 is produced?

    asked by Anonymous on January 13, 2015
  7. 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

    asked by Debra on October 23, 2011
  8. physics

    calculate the amount of heat energy required to melt a 1kg iron ingot initially at 20 ¡ãC? (heat of fusion for Fe is 33.0 J/g

    asked by rose on August 4, 2014
  9. 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) q = mass x specific heat x

    asked by Lauren on February 4, 2008
  10. 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

    asked by Marie on March 5, 2007
  11. Physics

    To raise the temperature of a 2.0-kg piece of metal from 20ºC to 100ºC, 61.8 kJ of heat is added. What is the specific heat of this metal in kJ/(kg.K)? Question 1 options: A) 0.39 B) 0.31 C) 1.6 D) 1.2 E) 0.77

    asked by Zuen-Lee on August 12, 2011
  12. Chemistry

    How much heat is needed to raise the temperature of 5.58 kilograms of iron from 20.0°C to 1000.0°C? Specific heat of iron is 450,000 J/(kg x °C). Type the correct answer to 3 significant digits.

    asked by Sylvie on June 14, 2016
  13. Physical Science

    Ninety kilojoules of heat were added to a 2.0-kg piece of wood whose temperture then rose from 20 degrees Celsius to 48 degrees Celcius. What was the specific heat of the wood?

    asked by Jaskson on September 18, 2011
  14. Chemistry honors

    A 500 g piece of iron changes 7°C when heat is added. How much heat energy produced this change in temperature? C of iron is 0.450 J/g°C

    asked by Anonymous on December 9, 2018
  15. Chemistry

    The temperature of a 2.0 g sample of aluminum increases from 25 to 30 degrees celcius. How many joules of heat energy were added? Specific heat of Aluminum is .9

    asked by Nichole on May 18, 2011
  16. chem

    The heat of combustion of bituminous coal is 2.50 × 104 J/g. What quantity of the coal is required to produce the energy to convert 137.7 pounds of ice at 0.00°C to steam at 100.°C? specific heat (ice) = 2.10 J/g°C specific heat (water) = 4.18 J/g°C

    asked by Bogdanam on December 15, 2010
  17. science

    1125 J of energy is used to heat 250 g of iron to 55 °C. The specific heat capacity of iron is 0.45 J/(g·°C). What was the temperature of the iron before it was heated?

    asked by jaeson on April 21, 2020
  18. Chemistry

    1) Determine the amount of heat in kJ given off when 1.26 x 10^4 g of NO2 are produced according to the equation: 2NO (g) + O2 (g) --> 2NO2 (g) and delta (H) = 483.6 kJ/mol 2) A sheet of gold weighing 10 g and at a temperature of 18 degrees C is placed on

    asked by Tim on November 18, 2014
  19. chemistry

    1125 J of energy is used to heat 250 g of iron. After heating, the final temperature of the iron is measured as 55 °C. The specific heat capacity of iron is 0.45 J/(g·°C). What was the initial temperature of the iron? A. 45 B. 55 C. 20 D. 35 I don't

    asked by Maddie on June 8, 2018
  20. Science

    "Most of the solar radiation is absorbed by the atmosphere and much of what reaches the earth's surface is radiated back into the atmosphere to become heat energy." What can you conclude about heat energy? Most of the sun's energy is used to make heat

    asked by JImmy on February 22, 2018
  21. chemistry

    a 2kg block of iron is given 10kj of energy and its temperature rises by 10c. what is the specific heat capacity of iron?

    asked by sue on September 22, 2011
  22. chemistry

    a 2kg block of iron is given 10kj of energy and its temperature rises by 10c. what is the specific heat capacity of iron?

    asked by sue on September 22, 2011
  23. Chemistry

    How many joules are required to raise the temperature of 450mL of water from 30 °C to 100 °C? The specific heat of copper metal is 0.385 J/ g- K. How many KJ of heat needed to raise the temperature of 1.1 kg block of copper from 27.5 C to 50 C? If 200 J

    asked by Jenner on March 19, 2017
  24. Integrated Physics and Chemistry

    Matching... Heat engine Heat pump Boiler Thermostat -a heating appliance that uses heat energy released from fossil fuels to warm water for use in radiant or convection heating systems -a appliacne that controls the maintenance temperature of a heating

    asked by Ashley on April 19, 2011
  25. math

    Problem The latent heat of fusion (solid become liquid) for ice is 79.8 cal/gram. How much ice can we melt with 1000 calories of heat? Problem Which would require more heat, melting 500 g of 0 C ice or turning 500 g of 100 C water into steam? Problem A 500

    asked by sherri on October 6, 2008
  26. Physics

    Just as no mechanical device can be 100% efficient, no heat engine can transfer 100% of its heat to a single object. Some of the heat energy must be wasted (released into the environment). We have a heat engine that produces 150 J of heat, does 40 J of

    asked by Jessica on December 7, 2016
  27. had

    A 0.106 kg ice cube is taken out of a freezer with temperature -16°C. 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

    asked by Anonymous on March 3, 2014
  28. chemistry

    The specific heat of iron is 0.498 J/g °C. If 341 J of heat is added to 154.1 g of iron at 25.0 °C, what is the new temperature of the iron?

    asked by paige on February 11, 2015
  29. Chemistry (specific heat)

    1125 J of energy is used to heat 250 g of iron. After heating, the final temperature of the iron is measured as 55 °C. The specific heat capacity of iron is 0.45 J/(g·°C). What was the initial temperature of the iron?

    asked by Summer on April 11, 2018
  30. Chemistry

    106 g of iron at 84.0°C are placed in contact with 205 g of silver at 11.0°C. If no heat is lost to the surroundings, what is the final temperature of the metals? The specific heat of iron is 0.418 J/g·°C and that of silver is 0.251 J/g·°C. 92.0 g of

    asked by Becky on April 25, 2011
  31. 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

    asked by faith on December 19, 2011
  32. Chemistry - Heat of Fusion of Ice

    Conclusion question(s) from a lab we did to find the heat of fusion of ice: Does the value obtained for the molar heat of fusion depend on the volume of water used? Does it depend on the mass of ice melted? Does it depend on the final temperature of the

    asked by J.M. on October 1, 2006
  33. 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

    asked by Lance on June 27, 2011
  34. 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

    asked by Lance on June 27, 2011
  35. physics

    1. Temperature is distinguished from heat when we note that whereas temperature is ____________________. A) None of these.B) measured in degrees, heat is measured in units of energy.C) a measure of average translational kinetic energy per molecule, heat is

    asked by Kristie on March 25, 2012
  36. 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

    asked by claudia on January 18, 2007
  37. Chemistry

    What amount of energy is required to melt a 27.4 g piece of ice at 0oC? The heat of fusion of ice = 333 Jg-1 Heat required to melt the ice 9.12e3 = J What amount of energy must be removed from 123 g of water to cool it from 71.6oC to 9.41oC? Specific heat

    asked by Jill on October 2, 2014
  38. 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

    asked by Michelle on March 19, 2007
  39. AP Chemistry

    A 500 g piece of metal at 60 degrees celsius is placed in 200g of water at 22 degrees celsius contained in a coffee cup calorimeter. The metal and water come to the same temperature at 32.5 degrees cesius. The specific heat of the water is 4.184

    asked by Matthew on February 15, 2010
  40. Chemistry

    Hydrogen is burned in oxygen to release heat. How many grams of hydrogen gas must be burned to release enough heat to warm a 50.0 g block of iron, giving 5 mol of water? 2 H2(g) + O2(g) → 2 H2O(g) ΔH = −484 kJ Iron has a specific heat of 0.449

    asked by Lance on June 7, 2011
  41. chemistry

    1) Calculate the specific heat capacity (J/g oC) of iron, if a 803 g sample lost 937.4 J of heat energy in going from an initial temperature of 5.50 oC to a final temperature of 2.90 oC. 2)Calculate the final temperature (oC) of a 243 g sample of water

    asked by eng on February 17, 2010
  42. Chemistry

    55 kJ of heat are added to 200 kg of a metal at 28.00◦C and the temperature rises to 29.18◦C. What was the metal? 1. tungsten (specific heat = 0.134 J/g · ◦ C) 2. copper (specific heat = 0.385 J/g · ◦ C) 3. silver (specific heat = 0.233 J/g ·

    asked by Arturo on April 10, 2013
  43. physics-energy conservation

    when you apply the brakes of a car its kinetic energy or energy of motion decreases. a)to what form of energy is the kinetic energy converted? b)where does the resulting energy end up? Do the brake drums on the wheels heat up? so does it convert into heat

    asked by Emma on May 8, 2007
  44. chemistry

    the specific heat capacity of iron metal is 0.450 j/gk. how many joules of energy are needed to warm 1.31 g of iron from 20.00 C to 29.00 C?

    asked by Maria on November 8, 2012
  45. chemistry

    In an adiabatic calorimetry experiment, 100 mL of 0.500 M HCl was added to 100 mL 0.500 M NaOH to produce 200 mL 0.25 M NaCl. A temperature increase of 3.38 °C was measured. Calculate the heat of reaction associated with this process at 25 °C from the

    asked by kjhytrew on February 4, 2015
  46. chemistry

    When 1367 J of heat energy is added to 44.1 g of hexane, C6H14, the temperature increases by 13.7 °C. Calculate the molar heat capacity of C6H14.

    asked by anon on October 28, 2016
  47. intro chem HELp please

    1. Zinc is often used to calibrate calorimeters because it undergoes a very sharp phase transition from the solid to the liquid at 419.5oC. Calculate the enthalpy change when 5 g of zinc metal is heated from 100oC to the point where the entire sample is

    asked by John on November 5, 2010
  48. chemistry

    3960 J of heat are added to a 27.6 g sample of iron at 25 ◦ C. What is the final temperature of the iron? The specific heat of iron is 0.449 J/g · K. Answer in units of K

    asked by molly on September 2, 2012
  49. Chemistry

    3490 J of heat are added to a 20.4 g sample of iron at 20◦C. What is the final temperature of the iron? The specific heat of iron is 0.449 J/g · K. Answer in units of K.

    asked by Nicole on October 24, 2015
  50. science

    what is the heat capacity of iron when a 15.75-g piece of iron absorbs 1086.75 joules of heat energy, and it's temperature changes from 25 degrees celcius to 175 degrees celcius

    asked by ryan on November 23, 2012
  51. Chemistry

    if 6.5kJ of energy are added to 56.4g sample of iron at 24 degrees C what is the final temperature of the iron? The specific heat of iron is 0.449j/gC

    asked by Lexa on May 18, 2015
  52. chemistry

    calculate the heat energy required to raise the temperature of a 500. gram iron pipe from 25 degress celcius to 100 degrees celcius. the specific heat for iron is .45 J/g degrees celcius

    asked by andrea on May 12, 2013
  53. physical science

    If 500 kg of water at 200 degrees F is poured into a lake that is 50.0 degrees F, how much heat is added to the lake? Joules added = mass x specific heat water x delta T. mass = 500 kg Look up specific heat water in cal/kg delt T is 200. Solve for Joules

    asked by jan on June 22, 2007
  54. Lauren

    The amount of heat required to raise temperature of 55.85 g of iron 1 degrees C is called its A. Change of energy B. Enthalpy C. Molar heat capacity D. Specific heat capacity E. Specific Heat.

    asked by Chemistry on November 16, 2007
  55. Physic II

    A 992.0-g iron meteor impacts the earth at a speed of 1447.0 m/s. If its energy is entirely converted to heat of the meteorite, what will the resultant temperature rise be? (The specific heat for iron is 113 cal/kg.C)

    asked by Guliner on April 7, 2014
  56. Chemical thermodynamics

    An iron balls is drop into a congrats floor from a height of 10m. On the first rebouce it rises to 0.5m. Assume that all the macroscopic mechanical energy lost in cotillion with the floor goes into the ball and that specific heat capacity of is

    asked by Kunoun on July 21, 2017
  57. chemistry

    A 4.0 gram sample of iron was heated from 0 degrees celsius to 20 degrees celsius, and was found to have absorbed 35.2 Joules of heat. Calculate the specific heat of this piece of iron.

    asked by Anonymous on December 12, 2010
  58. physics

    A piece of iron block moves across a rough horizontal surface before coming to rest. The mass of the block is 1.8 kg, and its initial speed is 3.8 m/s. How much does the block's temperature increase, if it absorbs 69% of its initial kinetic energy as

    asked by logan on April 21, 2014
  59. Chemistry Science

    A piece of iron with a mass of 35 g is heated to 1305oC and then placed in a calorimeter containing 600 g of water. The temperature of the water increases from 25oc to 33oC. The specific heat of water is 4.184 J/g X C. Calculate the specific heat of the

    asked by vvfrn on May 27, 2012
  60. CHEMISTRY

    Suppose a sample of hot iron is dropped in a cup of room temperature water. a) what happens to the temperature of the iron & water? b.) in what direction does heat flow occur? c.) when does heat flow stop? d.) assuming no heat is lost to the environment,

    asked by Emma on September 29, 2015
  61. physics

    When a 310-g piece of iron at 180∘C is placed in a 95-g aluminum calorimeter cup containing 250 g of liquid at 10∘C, the final temperature is observed to be 32∘C. The value of specific heat for iron is 450 J/kg⋅C∘, and for aluminum is 900

    asked by Anonymous on June 4, 2014
  62. Chemistry

    If we heat a 10 g sample of gold and a 10 g sample of iron with 50 kJ of energy each, which will have the greatest change in temperature? gold specific heat= 0.129J/g degC) iron specific heat = (0.452 J/g degC)

    asked by Izzy on September 11, 2014
  63. Physics

    How much heat is absorved when a temparature of a piece of iron of mass 0.1kg and specific heat capacity 2*10 rest to power of 2 J/kg/k is rise from 25degree celcius to 75degree celcius

    asked by Samuel on February 20, 2016
  64. physics

    A short box with a large flat base is made of iron. The box has mass mI = 890 kg and specific heat cI = 450 J/kg◦C. The box is filled with water. The water has mass mW = 1220 kg and specific heat cW = 4180 J/kg◦C. The box and water are initially at

    asked by Jason on March 14, 2012
  65. Physics

    A 0.300 kg iron horseshoe that is initially at 550°C is dropped into a bucket containing 19.4 kg of water at 21.1°C. What is the final equilibrium temperature (in °C)? Neglect any heat transfer to or from the surroundings. Do not enter units. I'm taking

    asked by Sam on April 25, 2016
  66. Science 8R - help (please read!!!)

    Homework - Pick 4 out of the 6 forms (types) of energy and gives an example of each from your house. Types/Forms of Energy 1. Mechanical Energy 2. Electrical Energy 3. Electromagnetic Energy 4. Heat Energy 5. Chemical Energy 6. Nuclear Energy I'm picking

    asked by Laruen on November 26, 2012
  67. Chemistry

    I want to know the enthalpy change for this reaction which occurs in a blast furnace: Fe2O3(s) + 3C(s) --> 2Fe(l) + 3CO(g) You will need the heat of formation for CO, and ironIIIoxide, and the heatofmelting for iron. I suspect you have some temperature in

    asked by Alice on April 15, 2007
  68. principles of physics

    Temperature is distinguished from heat when we note that whereas temperature is ____________________. A) None of these.B) measured in degrees, heat is measured in units of energy.C) a measure of average translational kinetic energy per molecule, heat is

    asked by Kristie on March 24, 2012
  69. physics

    Temperature is distinguished from heat when we note that whereas temperature is ____________________. A) None of these.B) measured in degrees, heat is measured in units of energy.C) a measure of average translational kinetic energy per molecule, heat is

    asked by Kristie on March 24, 2012
  70. Physics

    A piece of copper with mass 2.5kg is heated from 30degree celcius to 80degree celcius. 50000 Joule of thermal energy is needed.What is the heat capacity of the piece of copper? What is the specific heat capacity of the piece of copper?

    asked by Da S on October 23, 2012
  71. Chemistry

    500.0mL of 0.220 mol/L HCl(aq) was added to a high quality insulated calorimeter containing 500.0mL of 0.200mol/L NaOH(aq).Both solutions had a density of 1.000g/mL & a specific heat of 4.184 J/g.K. The calorimeter had a heat capacity of 850.0 J/degree C.

    asked by Meenaakshi on March 23, 2012
  72. Chemistry HEAT OF FUSION

    What amount of energy is required to melt a 26.9 g piece of ice at 0oC? The heat of fusion of ice = 333 Jg-1 Heat required to melt the ice = J What amount of energy must be removed from 120 g of water to cool it from 72.1oC to 12.4oC? Specific heat of

    asked by tanner on October 6, 2011
  73. chemistry

    Calculate the final temperature if 50 kg of iron is heated from 15.0°C with 5000 kJ of heat. The molar heat capacity of iron is 25.08 J mol–1 K–1.

    asked by Lisa on January 24, 2015
  74. 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.

    asked by Dana on December 4, 2011
  75. Chemistry

    Calculate the heat transferred when a 23 g of iron nail is cooled from 67oC to 20oC. The specific heat of iron is 0.45 J/goC.

    asked by Jon on January 12, 2015
  76. science

    a 400 kg block of iron is heated from 295 k to 325 k. how much heat is absorbed by the iron? ( the specific heat is 450 j. /kg. k)

    asked by michelle on March 19, 2018
  77. physics

    A piece of iron has a mass of 0.4 kg and is initially at 500 degrees. It is lowered into a beaker with 20L of water at 22 degrees. What is the final equilibrium temperature? Assume there is no heat loss to the environment during the process.

    asked by Karthi on March 17, 2013
  78. chemistry

    When 0.667 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 108C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. what is the molar heat of reaction,

    asked by blasting on February 17, 2010
  79. Physics

    1. Determine the specific heat of a certain metal if a 450-g sample of it loses 34,500 joules of heat as its temperature drops by 97degC. 2. The temperature of a 55-g sample of a certain metal drops by 113degC as it losses 3,500 J of heat. What is the

    asked by Hershey on November 21, 2014
  80. Physics

    1. Determine the specific heat of a certain metal if a 450-g sample of it loses 34,500 joules of heat as its temperature drops by 97degC. 2. The temperature of a 55-g sample of a certain metal drops by 113degC as it losses 3,500 J of heat. What is the

    asked by Hershey on November 19, 2014
  81. Physics

    How many Btu of heat must be added to 900lbs of steel to raise its temperature from 20.0°F to 500°F? Specific heat of steel .115Btu/lb°F

    asked by Madison on April 2, 2012
  82. Chemistry 101

    A piece of metal weighing 10.65 grams releases 3450 joules of heat energy when it is cooled from 99.9c to 28.5c. Wheat is the specific heat capacity of the metal in J/g c..

    asked by Lilly on January 28, 2016
  83. Science again...

    What other form is released by a radio. A. Heat Energy B. Mechanical Energy C. Ultraviolet Radiation UV? Can you get a tan from your radio? What is that sound...is it mechanical energy? IS the radio warm? Heat energy because c is something to do with the

    asked by Missy on April 17, 2007
  84. chemistry

    If 100. g of iron at 100.0 C is placed in 200. g of water at 20.0 C in an insulated container, what will the temp, C, of the iron and the water ( C value is 4.18) when both are at the same temp? The specific heat of iron is 0.444 KJ/Kg C ---- steps would

    asked by Lily on September 15, 2006
  85. physics

    when a power station converts chemical or nuclear energy to electrical energy it converts about 50% of the energy to low grade heat suggest how people could use this energy before the power station operators allow it to enter the environment. why is this

    asked by Emma on May 8, 2007
  86. chemistry

    a 126g iron rod has a heat capacity of 58 j. What is the specific heat of iron?

    asked by Anonymous on January 27, 2015
  87. thermodynamics

    heat in the amount of 5 KJ is added while its internal energy decreases by 10 KJ. how much energy is transferred as work? for a process causing the same change of state but for which the work is zero, how much heat is transferred?

    asked by Anonymous on October 7, 2015
  88. Chemistry

    Please help me! I do not know what to do. 500.0 g ethyl alcohol at 25°C (C = 2.46 J/g x °C) absorbs 74.0 J of heat energy. What is the final temperature? What is the specific heat constant if 621 g of Metal A raises the temperature of 500.0 g of water by

    asked by Kate on September 25, 2014
  89. Chemistry

    please balance this chemical equation iron +oxygen > iron (III) oxide +energy Fe + O2> Fe2 O3 + heat and light

    asked by Donald on December 10, 2015
  90. Science

    A cold cast iron skillet is placed onto a stove top. When the stove is turned on, the skillet becomes very hot. Why does the skillet become hot? A) The skillet is losing energy (heat) to the stove. B) The stove is gaining energy (heat) from the skillet. C)

    asked by Anonymous on December 12, 2017
  91. Ms, Sue help me in science

    1. As a sample of matter is cooled, which property of its particles increases? (1 point)average kinetic energy pressure buoyancy cohesive forces 2. Kinetic energy is the _____ of motion. (1 point)temperature energy heat state 3. Substances that have a low

    asked by NIKE on April 10, 2012
  92. physics 2

    A system consists of 4.8 mol of an ideal monatomic gas at 375 K. (a) How much heat must be added to the system to double its internal energy at constant pressure? ? kJ (b) How much heat must be added to the system to double its internal energy at constant

    asked by kelsey lauren on December 15, 2008
  93. 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.

    asked by ashley on October 20, 2012
  94. 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)

    asked by Anonymous on March 27, 2013
  95. 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.

    asked by zach on April 7, 2013
  96. Chemistry

    A system has an initial energy of 117 joules. The energy equation includes --40.1 J of heat and -20.3 J of work. What is the final energy? Was heat added to the system or to the environment? Was work done by the system or to the system? Be sure to show all

    asked by Anonymous on May 3, 2017
  97. Chemistry

    Calculate the final temperature when 20.0 g at 60 *C iron is put into 50.0 ml of 20 *C water. The specific heat of iron is 0.449 J/g*C and that of water is 4.184*C. (Assume no heat is lost to the container or the surrounndings.)

    asked by Stacy on November 29, 2010
  98. chemistry

    I'm so irritated i cannot come up with the right answer. 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.

    asked by smh on October 21, 2012
  99. Physics

    a) When a material is heated, the change in temperature of the material for any given amount of energy is dependent on the material’ s heat capacity. How much energy will water requirements for each 1C increase in temperature? b) On average, 1370 W of

    asked by Anonymous on April 9, 2019
  100. physics

    A 17.0 kg child travels down a playground slide 3.50 m high and reaches the bottom with a speed of 2.50 m/s. How much heat was generated due to friction as a result of this process? my teacher hadn't taught anything about heat..but he did give us this

    asked by Cathy on February 23, 2007