Question

A chemical reaction is run in which 749 joules of work is done by the system and the internal energy changes by -1010 joules. Calculate q for the system. q = ______ joules.

Answer 1

According to the rules of change in internal energy of a system it can be calculated using the equation ΔU = q - w. Given the values, we can calculate q to be -261 joules.

Step-by-step explanation:

The change in internal energy of a system can be calculated using the equation:

ΔU = q - w

Given that the internal energy changes by -1010 joules and 749 joules of work is done by the system, we can rearrange the equation to solve for q:

q = ΔU + w

Substituting the values, we have q = -1010 J + 749 J = -261 J

Therefore, q for the system is -261 joules.