Four moles of ideal gas at 0C and atmospheric pressureundergoes isothermal expan

Question

Four moles of ideal gas at 0C and atmospheric pressureundergoes isothermal expansion where its volume is doubled. a) Calculate work the gas does. b) Is heat added to or taken away from the gas? Howmuch? c) Calculate the change in the internal energy of thegas. d) Calculate entropy change in the gas. Four moles of ideal gas at 0C and atmospheric pressureundergoes isothermal expansion where its volume is doubled. a) Calculate work the gas does. b) Is heat added to or taken away from the gas? Howmuch? c) Calculate the change in the internal energy of thegas. d) Calculate entropy change in the gas.

Explanation / Answer

Given that T = 273 K R = 8.31 J/mole-K V2 = 2V1 P = 1 atm a) W = 2.3026 * R * T log10(V2 /V1) b) Q = W c) An isothermal process is one in which the temperature of thesystem does not change. Hence there is no change in the internalenergy of the system.        i.e., U = 0 d) change in entropy   s = Q / T Substitute values.

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