Question

When work done by a system was 10J , the
increase in the internal energy of the system
was 30J. The heat q' supplied to the system
was:
1) -40J 2) +20J 3) 40J 4) -20J​

Answer 1

Explanation:

q =change in internal energy +work done

q = 30 + 10 = 40 J

3rd option is correct one.

Answer 2

The heat 'q' supplied to the system  was about 40 J.

Explanation:

• In the question we are given that Work has already been done by the system and the amount of work done is resulted into 10 joules.
• This resultant work done is the consequence of the internal Increase in energy and the heat that the system was supplied with which year is given as q .

Since,

q =  internal energy + work done

⇒ q Will be equal to 30 joules +10 joules

⇒ q = 40 j

To know more:

Heat of 30 kcal is supplied to a system and 4200j of external wok is done on the system so that it's volume decreases at constant pressure. What is the work done in its internal energy. (j=4200j/kcal)

https://brainly.in/question/13335163