Question

The work done by a system is 8 joule, when 40 joule heat is supplied to it, what is the increase in internal energy of system

• A. 25 J
• B. 30 J
• C. 32 J
• D. 28 J

Answer 1

Answer: (C)

32 J

Answer 2

$q = 40J$

$\mathbf{w =}\mathbf{-}\mathbf{8J}$ (work done by the system)

$\Delta E = q + w = 40 - 8 = 32J$