Question

Which of the following is true of an adiabatic process?

Answer 1

The answers are A,B,and D. APEX

Answer 2

Adiabatic process is that process in which heat of a closed system will remain conserved or we can say that system can not exchange its thermal energy from its surrounding

So here from 1st law of thermodynamics we can say

$\Delta Q = \Delta U + W$

since we know that

$\Delta Q = 0$

so we will have

$0 = \Delta U + W$

so we have

$-\Delta U = W$

so here correct answers are

A. -ΔU = W  

B. Heat is constant.