Aquantity of gas in a cylinder received 1600j of hear from a hot plate at the same time 800j of work are done on the gas what is the change in the internal energy?

Using the formula (delta)U = Q - W, where delta U is the change in the internal energy, W is the work done by the system, and Q is the additional heat added to the system, we are able to determine that the internal change is a total of 2400j.