Question

A gas expands and does work on the surroundings equal to 403 joules. At the same time, it absorbs 238 joules of heat from the surroundings. Calculate the change in energy (in joules) of the gas. Report answer to correct significant figures, but do not include units.

Answer 1

-165 (without units).

Step-by-step explanation:

Hello,

In this case, in terms of the first law of thermodynamics:

`Q-W=\Delta E`

Taking into account the 403 J of work done by the system and the 238 of heat absorbed from the surroundings, the change in energy for the gas results:

`\Delta E=238J-403J=-165J`

Thus, the value without units is -165.

Regards.