Question

A steam engine takes in 2,750 J of energy as heat, gives up 1,550 J of energy as heat to its surroundings, and does 850 J of work. What is the change in the internal energy of the engine

Answer 1

350 J

Step-by-step explanation:

Q = Input heat of the steam engine = 2750 J

H = Heat energy given of to the surroundings = 1500 J

W = Work done by the system = 850 J

The energy which the system possesses is known as internal energy

Change in internal energy is given by

`\Delta U=Q-H-W\\\Rightarrow \Delta U=2750-1550-850\\\Rightarrow \Delta U=350\ J`

The change in internal energy of the system is 350 J