Question

A thermodynamic system undergoes a process in which its internal energy decreases by 500 joules. At the same time, 220 joules of work is done on the system. What is the amount of heat transferred to or from the system? 280 joules

Answer 1

The other person is right, the answer is D. -720 joules for plato users, i got 100% on the test :)

Answer 2

`- 720 Joules\\`

Step-by-step explanation:

As per the first law of thermodynamics,

`d U = Q + W\\`

U is change in the internal energy of the system and W is work done on the system.

`Q = d U - W \\= - 500 J - 220 J\\= -720 Joules\\`