Answer:
<u>400</u> J work is done BY the engine.
The internal energy of the gas is <u>620</u> J
Explanation:
The given information are;
The heat added to the cylinder = 620 J
The force applied by the piston of the engine = 8.0 kN = 8,000 N
The distance over which the force moves (the piston) = 5.0 cm = 0.05 m
The work done (by the engine) = Force × Distance = 8,000 N × 0.05 m = 400 J
The internal energy is the sum of the kinetic and potential energy of the system
Therefore, given that the internal energy, U, is the sum total of the energy in the system
∴ U = The heat supplied to the system = 620 J
Which gives;
<u>400</u> J work is done BY the engine.
The internal energy of the gas is <u>620</u> J.
