Question

When work done by a system wis $10$J, the increase in the internal energy of the system is $30$ J. The heat $q$ supplied to the system is:

Answer 1

Let us consider the problem:

Given that:

$\Delta U=30$J

$\Delta W=-10$J

Using First law of thermodynamics,

$dQ=dU+dW$

Implies that

$=30J-10J$

$=20J$.