Q.

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 37.0 °C. As it does so, it absorbs 208 J of heat. The values of q and w for the process will be

R=83.14JK1mol1,ln7.5=2.01

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a

q=+208J,w=208J

b

q=208J,w=208J

c

q=208J,w=+208J

d

q=+208J,w=+208J

answer is A.

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Detailed Solution

For an isothermal expansion of an ideal gas, ΔU=0. From the first law of thermodynamics, q=w Since heat is absorbed, q=208J and w=208J

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