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Transcribed Image Text:QUESTION 4
a) A process involving an ideal gas is carried out in which the temperature changes (AT) at
constant volume (V). Consider the following two processes
Process A: for a fixed value AT, the mass of the gas (m) is doubled.
Process B: the process is repeated with the same initial mass but AT is doubled.
State which process has a greater change in entropy (AS). Explain your answer in terms
of AS for each process.
Write your answer here
b) One mole of N2 at 20.5 °C and 6.00 bar undergoes a transformation to the state described
by 145 °C and 2.75 bar. Calculate change in entropy (AS) (in unit J K1). (Assume ideal
gas behaviour).
Given that the molar heat capacity at constant pressure
T
(CP.m)[J mol¬1 K = 30.81 – 11.87 × 10-3– + .
K?
+ 2.3968 × 10-5
K
1.0176 × 10¬8
K3
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