three hundred joules of heat are added to a system. the system uses 140 joules to do work. by how much did…

three hundred joules of heat are added to a system. the system uses 140 joules to do work. by how much did the internal energy of the system change?\no 140 j\no 160 j\no 240 j\no 440 j

three hundred joules of heat are added to a system. the system uses 140 joules to do work. by how much did the internal energy of the system change?\no 140 j\no 160 j\no 240 j\no 440 j

Answer

Explanation:

Step1: Recall the first - law of thermodynamics

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 $Q = 300\ J$ (heat added to the system) and $W=140\ J$ (work done by the system).

Step3: Calculate the change in internal energy

Substitute the values into the formula: $\Delta U=Q - W=300 - 140$. $\Delta U = 160\ J$

Answer:

160 J