TD test 1

A stationary mass of gas is compressed without friction from an initial state of 0.3 m3 and 0.105 MPa to a final state of 0.15 m3 and 0.105 MPa, the pressure remaining constant during the process. There is a transfer of heat 37.6 kJ from the gas during the process. How much does the internal energy of the gas change?

Write equation of first law of thermodynamics

Air at 110 K and 101.32 kPa is passing through a converging nozzle and leaves at 300 K. Determine the velocity of air at nozzle outlet. The nozzle is laid horizontal. The inlet velocity of air is 10 m/s.