Suppose that q is negative and w is positive for a gas (from the perspective of the system). This means that the system __________ heat and work is done __________. Group of answer choices Loses; On the system Gains; On the system Gains; By the system Loses; By the system Not enough information

Under what conditions will the quantity q be a positive number and the quantity w be a positive number? Oq is positive when the system loses heat to surroundings, w is positive when the surroundings does work on the 4 system. qis positive when the system loses heat to surroundings, w is positive when the system does work on the surroundings. qis positive when the system gains heat from surroundings, w is positive when the surroundings does work on the system. O qis positive when the system gains heat from surroundings, w is positive when the system does work on the surroundings.

An automobile engine provides 530 joules of work to push the pistons. In this process the internal energy changes by 2915 joules. Calculate q for the engine. This represents the amount of heat that must be carried away by the cooling system.

A heat engine is used to convert heat into work. If it draws heat from a bath at 500 K, converts it to work, then delivers the remaining heat into a bath at 200 K, what is its maximum possible efficiency?

A chemical reaction produces 479.3 kJ of heat and performs 81.6 kJ of work on the surroundings. What is the exchange of internal energy in the reaction? Calculate your answer to one decimal place and do not include units.