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
[tex]\Delta Q = \Delta U + W[/tex]
since we know that
[tex]\Delta Q = 0[/tex]
so we will have
[tex]0 = \Delta U + W[/tex]
so we have
[tex]-\Delta U = W[/tex]
so here correct answers are
A. -ΔU = W
B. Heat is constant.
