### What is the entropy change of the gas

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Q1. An electric field of 8.60 x 107 V/m is desired between two parallel plates, each of area 35.0 cm2 and separated by 2.45 mm of air. What charge must be on each plate?

Q2. Assume 4.00 mol of an ideal gas undergoes a reversible isothermal expansion from volume V1 to volume V2 = 4V1 at temperature T = 250 K. Find (a) work done by the gas and (b) he entropy change of the gas. (c) If expansion is reversible and adiabatic instead of isothermal, what is the entropy change of the gas?

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