Question

3. I 50 calories are added to a system and system
does work of 30 calories on surroundings then the
change in internal energy of system is​

Answer 1

Answer:

If 50 calorie are added to a system and system does work of 30 calorie on surroundings, the change in internal energy of system is: ... 40 cal.

Explanation:

Hoped my answer helped you and mark me as BRAINLIEST

Answer 2

Answer:

q=∆U+W∆U+W

50=∆∆U+30

∆∆U = 20 cal