Question

3 numeric 5 points a system absorbs 500 j of heat and does 200 j of work. what is the change in internal energy in joules? answer

Explanation:

Step1: Recall the first - law formula

The first - law of thermodynamics is $\Delta U = Q - W$, where $\Delta U$ is the change in internal energy, $Q$ is the heat added to the system, and $W$ is the work done by the system.

Step2: Identify the values of $Q$ and $W$

Given that $Q = 500\ J$ (heat absorbed, so positive) and $W=200\ J$ (work done by the system, so positive).

Step3: Substitute values into the formula

$\Delta U=500 - 200$.

Answer:

300