of 1 mole of a monatomic gas is increased from 25°C to300°C.3.20 One mole of an ideal gas undergoes an isothermaexpansion at 300 K from 1.00 atm to a final pressurewhile performing 200 J of expansion work. Calculatethe final pressure of the gas if the external pressure s0.20 atm.Heat Capacities3.21 A 6.22-kg piece of copper metal is heated from20.5° C to 324.3°C. Given that the specific heat of Cu is0.385 J g1 °C-1, calculate the heat absorbed (in kJ) bythe metal.3.22 A 10.0-g sheet of gold with a temperature of18.0°C is laid flat on a sheet of iron that weighs 20.0 gand has a temperature of 55.6°C. Given that the specificheats of Au and Fe are 0.129 J g-1 C-1 and 0.444Jg-1 oc1, respectively, what is the final temperature ofthe combined metals? Assume that no heat is lost to thesurroundings. (Hint: The heat gained by the gold mustbe equal to the heat lost by the iron.)3.23 It takes 330 joules of energy to raise the tempera-ture of 24.6 g of benzene from 21.0°C to 28.7°C at constant pressure. What is thezene at constant pressure?3.24 The molar heat of vaporization for water is 44.0kJ mol-1 at 298 K and 40.79 kJ mol-qualitative explanation of thvalues.molar heat capacity of ben-1 at 373 K. Give ae difference in these two3.25 The constant-pressure molar heat capacity of ni-

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Asked Jan 25, 2019
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3.22

of 1 mole of a monatomic gas is increased from 25°C to
300°C.
3.20 One mole of an ideal gas undergoes an isotherma
expansion at 300 K from 1.00 atm to a final pressure
while performing 200 J of expansion work. Calculate
the final pressure of the gas if the external pressure s
0.20 atm.
Heat Capacities
3.21 A 6.22-kg piece of copper metal is heated from
20.5° C to 324.3°C. Given that the specific heat of Cu is
0.385 J g1 °C-1, calculate the heat absorbed (in kJ) by
the metal.
3.22 A 10.0-g sheet of gold with a temperature of
18.0°C is laid flat on a sheet of iron that weighs 20.0 g
and has a temperature of 55.6°C. Given that the specific
heats of Au and Fe are 0.129 J g-1 C-1 and 0.444
Jg-1 oc1, respectively, what is the final temperature of
the combined metals? Assume that no heat is lost to the
surroundings. (Hint: The heat gained by the gold must
be equal to the heat lost by the iron.)
3.23 It takes 330 joules of energy to raise the tempera-
ture of 24.6 g of benzene from 21.0°C to 28.7°C at con
stant pressure. What is the
zene at constant pressure?
3.24 The molar heat of vaporization for water is 44.0
kJ mol-1 at 298 K and 40.79 kJ mol-
qualitative explanation of th
values.
molar heat capacity of ben-
1 at 373 K. Give a
e difference in these two
3.25 The constant-pressure molar heat capacit
y of ni-
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of 1 mole of a monatomic gas is increased from 25°C to 300°C. 3.20 One mole of an ideal gas undergoes an isotherma expansion at 300 K from 1.00 atm to a final pressure while performing 200 J of expansion work. Calculate the final pressure of the gas if the external pressure s 0.20 atm. Heat Capacities 3.21 A 6.22-kg piece of copper metal is heated from 20.5° C to 324.3°C. Given that the specific heat of Cu is 0.385 J g1 °C-1, calculate the heat absorbed (in kJ) by the metal. 3.22 A 10.0-g sheet of gold with a temperature of 18.0°C is laid flat on a sheet of iron that weighs 20.0 g and has a temperature of 55.6°C. Given that the specific heats of Au and Fe are 0.129 J g-1 C-1 and 0.444 Jg-1 oc1, respectively, what is the final temperature of the combined metals? Assume that no heat is lost to the surroundings. (Hint: The heat gained by the gold must be equal to the heat lost by the iron.) 3.23 It takes 330 joules of energy to raise the tempera- ture of 24.6 g of benzene from 21.0°C to 28.7°C at con stant pressure. What is the zene at constant pressure? 3.24 The molar heat of vaporization for water is 44.0 kJ mol-1 at 298 K and 40.79 kJ mol- qualitative explanation of th values. molar heat capacity of ben- 1 at 373 K. Give a e difference in these two 3.25 The constant-pressure molar heat capacit y of ni-

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Expert Answer

Step 1

In the mentioned system of the two metals, iron is at a higher temperature than gold. So, when kept in contact, iron would lose heat and gold would gain heat to reach thermal equilibrium.The amount of heat released by iron would be same as the amount of heat absorbed by gold.

Step 2

Amount of heat absorbed by gold;

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Step 3

Amount of heat relea...

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