3.00 moles of oxygen gas undergoes a reversible isobaric expansion where its vol

Question

3.00 moles of oxygen gas undergoes a reversible isobaric expansion where its volume increases such that V_r = 7.30 V_1. What is the change in entropy of the gas? The molar specific heat of oxygen gas is 29.4 J/(mol middot K). What is the basic definition of entropy change How is the transfer of heat related to the molar specific heat CP? Consider the ideal gas law to find the ratio of the temperatures. J/K Find the increase in entropy of 4.23 kg of liquid nitrogen that starts at its boiling temperature, boils, and warms to 26.0 degree C at constant pressure. The specific heat of nitrogen gas at constant pressure is 1040 J/(kg middot degree C), heat of vaporization is 201 kJ/kg, and its boiling point is -195.8 degree C.

Explanation / Answer

part 1 )

S = cv*ln(Tf/Ti) + R*ln(Vf/Vi)

cv = 29.4 J/mol-K

pressure is constant

Vi/Ti = Vf/Tf

Tf/Ti = Vf/Vi

Tf/Ti = 7.3

S = 74.97 J/K

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