Question

The AE of a system that absorbs 2,500 J ofheat and does 7,655 J of work on itsenvironment is of_________j.A. 10.155B. 5155C.-5,155D.-10.155

Answer 1

Answer:

$C\text{ : -5,155 J}$

Explanation:

Here, we want to get the change in the internal energy of the system

Mathematically, according to the 1st law of thermodynamics, we have it that:

$\Delta E\text{ = Q - W}$

where:

Q = 2,500 J

W = +7,655 J

W is positive since work is done by the system

Substituting the values into the equation above, we have it that:

$\begin{gathered} \Delta E\text{ = 2500 - 7655} \\ \Delta E\text{ = -5,155 J} \end{gathered}$