1. One mole of O2(g) undergoes the following change in state. O2(g, 353 K, 5.03
ID: 1078549 • Letter: 1
Question
1. One mole of O2(g) undergoes the following change in state.
O2(g, 353 K, 5.03 bar) O2(g, 401 K, 2.21 bar)
What is S for the gas? Assume ideal gas behaviour.
The constant pressure molar heat capacity for O2(g) is Cp,m = 29.10 J K1 mol1.
Enter your answers in the specified units with three or more significant figures . Do not include units as part of your answer.
S = ____________ J K1
2. What are the values of q, w, U, H, S, Ssurr, and Suniv for the following a constant pressure process for a system containing 0.300 moles of CH3OH ?
CH3OH(l, 22.0 ºC, 1.00 atm) CH3OH(g, 115.0 ºC, 1.00 atm)
Assume that the volume of CH3OH(l) is much less than that of CH3OH(g) and that CH3OH(g) behaves as an ideal gas. Also, assume that the temperature of the surroundings is 115.0 ºC.
Molar heat capacity for CH3OH(l), Cp,m = 81.1 J K1 mol1
Molar heat capacity for CH3OH(g), Cp,m = 44.1 J K1 mol1
Enthalpy of vaporization, vapH = 35.2 kJ mol1 at 64.7 ºC and 1.00 atm
q = ____________ J
w = ____________ J
U = ____________ J
H = ____________ J
S = ____________ J K1
Ssurr = ____________ J K1
Suniv = ____________ J K1
Explanation / Answer
1. One mole of O2(g) undergoes the following change in state. O2(g, 353 K, 5.03
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