Experimental measurements of the heat capacity of aluminum at a constant pressure and at low temperatures...
Experimental measurements of the heat capacity of aluminum at a constant pressure and at low temperatures (below about 50 K) can be fit to the formula
C =aT+bT^3
where for some particular metal, a = 0.00135 J/K2 and b = 2.48 ×
10−5 J/K4.
-
What is the heat needed to heat the metal at a constant pressure from 5 K to 10 K?
-
What is the change in entropy of the metal over this change. By what factor does the multiplicity of metal change?
Homework Answers
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Experimental measurements of the heat capacity of aluminum at a
constant pressure and at low temperatures...
The constant-pressure molar heat capacity of H2O (s) and H2O (l) is 75.291 J K−1 mol−1...
The constant-pressure molar heat capacity of H2O (s) and H2O (l) is 75.291 J K−1 mol−1 and that of H2O (g) is 33.58 J K−1 mol−1 . Assume that the constant-pressure molar heat capacities are constant over the studied temperature range. Calculate the change in entropy of the system when 15.0 g of ice at −12.0 °C is converted to water vapour at 105.0 °C at a constant pressure of 1 bar!
Heat Capacity of a Gas at Constant Pressure A system comprised of 7.900×101 g of H2(g)...
Heat Capacity of a Gas at Constant Pressure
A system comprised of 7.900×101 g of
H2(g) cools from 170.0°C to
35.0°C at a constant pressure of 4.5
atm.
The molar heat capacity at constant pressure for
H2(g) is 28.86 J K−1
mol−1.
a) Calculate q.
b) Calculate w.
c) Calculate
.
d) Calculate
.
Note - for part a) I have tried -1.54*10^5 J, 1.54*10^5 J and
-3.08*10^5 J (these are all wrong). I'm on my last try, please
help!
Nitrous oxide (N2O) behaves as an ideal gas and has a heat capacity at constant pressure...
Nitrous oxide (N2O) behaves as an ideal gas and has a heat capacity at constant pressure CP = 38.6 J/K∙mol. 4.2 moles of N2O initially at 298 K are heated at constant pressure until a final temperature of 358 K is reached. (a) Calculate the enthalpy change of N2O during that process. (b) Calculate the heat transfer Q during that process. (c) Calculate the work W performed during that process. (d) Calculate the change in internal energy ΔU during that...
(b) The constant-pressure heat capacity of a sample of 1 00 mol of a perfect gas...
(b) The constant-pressure heat capacity of a sample of 1 00 mol of a perfect gas was found to vary with temperature according to the expression Cp/(J K)20 17 + 0 4001 (TK) Calculate q, w, AU and AH when the temperature is raised from 0°C to 100°C ) at constant pressure (u) at constant volume (10)
(b) The constant-pressure heat capacity of a sample of 1 00 mol of a perfect gas was found to vary with temperature according...
Heat Capacity of a Gas at Constant Pressure A system comprised of 5.500x101 g of Ar(g)...
Heat Capacity of a Gas at Constant Pressure A system comprised of 5.500x101 g of Ar(g) cools from 165.0°C to 30.0°C at a constant pressure of 3.0 atm. The molar heat capacity at constant pressure for Ar(g) is 20.80 J K-1 mol-1. Calculate q. 1pts Submit Answer Tries 0/5 Calculate w 1pts Submit Answer Tries 0/5 Calculate ΔΕ. 1 pts Submit Answer Tries 0/5 Calculate ΔΗ. 1pts Submit Answer Tries 0/5
Heat Evolved During Combustion and Heat Capacity of a Gas at Constant Pressure A. Consider the...
Heat Evolved During Combustion and Heat Capacity of a
Gas at Constant Pressure
A.
Consider the following reaction:
2 C2H2(g) + 5
O2(g)
4 CO2(g) + 2H2O(l)
Use standard heats of formation from Zumdahl 'Chemical
Principles' 8th ed. Appendix Four pp A19 - A21.
a) How much heat is evolved when
1.440×101 moles of
C2H2(g) is burned in excess oxygen.
Answer to 4 sig figs.
b) How much heat is evolved when
2.250×102 g of CO2(g) is produced
from the...
The constant pressure molar heat capacity of argon is 20.79 J K-1 mol-1 at 298 K....
The constant pressure molar heat capacity of argon is 20.79 J K-1 mol-1 at 298 K. Predict the value of the constant volume molar heat capacity of argon at this temperature.
Need work step by step please! Heat Capacity of a Gas at Constant Pressure A system...
Need work step by step please!
Heat Capacity of a Gas at Constant Pressure A system comprised of 1.900x100 g of C2H6(9) cools from 180.0°C to 45.0°C at a constant pressure of 2.5 atm. The molar heat capacity at constant pressure for C2H6(9) is 52.92 J K-1 mol-1. Calculate q. 1 pts Submit Answer Tries 0/5 Calculate w. 1 pts Submit Answer Tries 0/5 Calculate ΔΕ. 1pts Submit Answer Tries 0/5 Calculate ΔΗ. 1pts Submit Answer Tries 0/5
The temperature dependence of the molar heat capacity at constant pressure for Cl_2(g) in the temperature...
The temperature dependence of the molar heat capacity at constant pressure for Cl_2(g) in the temperature range from 298-800 K is: C_p, m(J mol^-1 K^-1) = 22.85 - 0.06543T - (1.2517 times 10^-4)T^2 + (1.1484 times 10^-7)T^3 Where T is the Kelvin temperature. Calculate the heat required to raise the temperature of 1.000 mole of Cl_2(g) from 300 K to 800 K.
2. For a heat engine shown below, the low temperature in the cycle increases from 275...
2. For a heat engine shown below, the low temperature in the cycle increases from 275 to 285 K, while other temperatures (including the low temperature reservoir) and QH stay the same. What happens to the entropy change of the low-temperature reservoir? Explain for full credit hot reservoirTh500 K 1250. ー S,--2.50 JIK A. decreases QH1250. J B. increases TH 500 K C. does not change 0.43 Ws-538.J Tc 285K AStotal 0.09 J/K Qc -713. J ASc 2.59 J/K cold...
(b) The constant-pressure heat capacity of a sample of 1 00 mol of a perfect gas was found to vary with temperature according to the expression Cp/(J K)20 17 + 0 4001 (TK) Calculate q, w, AU and AH when the temperature is raised from 0°C to 100°C ) at constant pressure (u) at constant volume (10)
(b) The constant-pressure heat capacity of a sample of 1 00 mol of a perfect gas was found to vary with temperature according...
Heat Capacity of a Gas at Constant Pressure A system comprised of 5.500x101 g of Ar(g) cools from 165.0°C to 30.0°C at a constant pressure of 3.0 atm. The molar heat capacity at constant pressure for Ar(g) is 20.80 J K-1 mol-1. Calculate q. 1pts Submit Answer Tries 0/5 Calculate w 1pts Submit Answer Tries 0/5 Calculate ΔΕ. 1 pts Submit Answer Tries 0/5 Calculate ΔΗ. 1pts Submit Answer Tries 0/5
Heat Evolved During Combustion and Heat Capacity of a
Gas at Constant Pressure
A.
Consider the following reaction:
2 C2H2(g) + 5
O2(g)
4 CO2(g) + 2H2O(l)
Use standard heats of formation from Zumdahl 'Chemical
Principles' 8th ed. Appendix Four pp A19 - A21.
a) How much heat is evolved when
1.440×101 moles of
C2H2(g) is burned in excess oxygen.
Answer to 4 sig figs.
b) How much heat is evolved when
2.250×102 g of CO2(g) is produced
from the...
Need work step by step please!
Heat Capacity of a Gas at Constant Pressure A system comprised of 1.900x100 g of C2H6(9) cools from 180.0°C to 45.0°C at a constant pressure of 2.5 atm. The molar heat capacity at constant pressure for C2H6(9) is 52.92 J K-1 mol-1. Calculate q. 1 pts Submit Answer Tries 0/5 Calculate w. 1 pts Submit Answer Tries 0/5 Calculate ΔΕ. 1pts Submit Answer Tries 0/5 Calculate ΔΗ. 1pts Submit Answer Tries 0/5
The temperature dependence of the molar heat capacity at constant pressure for Cl_2(g) in the temperature range from 298-800 K is: C_p, m(J mol^-1 K^-1) = 22.85 - 0.06543T - (1.2517 times 10^-4)T^2 + (1.1484 times 10^-7)T^3 Where T is the Kelvin temperature. Calculate the heat required to raise the temperature of 1.000 mole of Cl_2(g) from 300 K to 800 K.
2. For a heat engine shown below, the low temperature in the cycle increases from 275 to 285 K, while other temperatures (including the low temperature reservoir) and QH stay the same. What happens to the entropy change of the low-temperature reservoir? Explain for full credit hot reservoirTh500 K 1250. ー S,--2.50 JIK A. decreases QH1250. J B. increases TH 500 K C. does not change 0.43 Ws-538.J Tc 285K AStotal 0.09 J/K Qc -713. J ASc 2.59 J/K cold...
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