Answer:
C. -800J
Explanation:
Q = W + ∆U
Q = quantity of heat transferred = 0 for adiabatic processes, W = work done = 800J
∆U = Q - W = 0 - 800 = -800J
Answer: b. 800 J
∆U = -W = -(-800J)
∆U = 800J
Explanation:
In an adiabatic process, no heat is added or removed from the system.
Change in the internal energy of a system can be written as;
∆U = Q - W
Where ∆U is the change in the internal energy,
Q is the heat added to the system and W is the workdone by system.
For adiabatic process
∆U = -W (since Q = 0, no heat addition or removal)
Since in the case above.
Workdone on system is 800J
Workdone by system W = -800J
So,
∆U = -W = -(-800J)
∆U = 800J
