Physics

Leroy Mclean

10 November, 22:15

Question 1 [7]

Hydrogen gas is used in a Carnot cycle having an efficiency of 60% with a low temperature of 300K. During the heat rejection the pressure changes from 90 kPa to 120 kPa. Find the high and low temperature heat transfer and the net cycle work per unit mass of hydrogen.

Question 2 [8]

A rigid insulated container has two rooms separated by a membrane. Room A contains 1 kg of air at 200°C and Room B contains 1.5 kg of air at 20°C, both rooms are at 100 kPa. Consider two different cases

A. The Heat transfer between A and B creates a final uniform T

B. The membrane breaks and air comes to a uniform state.

For both cases find the final temperature. Are the two-process reversible and different? Explain. Download docx