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03/10/2021 12:08 pm
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A piston filled with 0.04 mol of an ideal gas expands reversibly from 50.0 mL to 375 mL at a constant temperature of 37.0ºC. As it does so, it absorbs 208 J of heat. The values of q and w for the process will be: (R = 8.314 J/mol K) (ln 7.5 = 2.01)
(a) q = + 208 J, w = – 208 J
(b) q = – 208 J, w = – 208 J
(c) q = – 208 J, w = + 208 J
(d) q = + 208 J, w = + 208 J
1 Answer
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03/10/2021 12:10 pm
Correct answer: (a) q = + 208 J, w = – 208 J
Explanation:
Process is isothermal reversible expansion, hence
ΔU = 0, therefore q = -w.
Since q = +208 J, W = -208 J