Question

Question 4 of 10 A system gains 637 kJ of heat, resulting in a change in internal energy of the system equal to +191 kl. How much work is done? Choose thve correct statement. Work was done on the system. Work was done by the systen

Answer 1

Given

Change in internal energy $\Delta$ U = 191 kJ

Heat gained by the system (q) = 637 kJ

From First law of thermodynamics we have relation $\Delta$ U = q + w

Where, $\Delta$ U is change in internal energy , q is heat added to system and w is work done.

$\therefore$ 191 kJ = 637 kJ + w

$\therefore$ w = 191 kJ - 637 kJ = - 446 kJ

Negative sign indicates that work is done by the system

ANSWER : w = - 446 kJ

Correct statement : Work was done by the system .