Solar homes often use water to collect heat from the sun. if the same amount of heat was used on 2500 kg of water in one house and 1500 kg of water in a second house, what will happen?
the 2500 kg of water will reach a higher temperature.
the 1500 kg of water will reach a higher temperature.
the water in both houses will reach the same temperature.
there will be no significant change to either.

what is the best description of an isolated system?
a system in which matter and energy are not exchanged with the surroundings
a system in which matter can enter or leave the system but energy cannot

1. The 1500 kg of water will reach a higher temperature.

2. An isolated system is one in which matter and energy are not exchanged with the surroundings.

Explanation:

In the first case, the mass is inversely proportional to the temperature at constant rate of energy absorbtion. When the mass is decreased, then an increase in temperature. So, 1500 kg of water would have a higher temperature compared to that of 2500 kg.

In the second case, when a system is an isolated one, it implies that it share nothing with her surroundings. An example is a hot water in a well lagged thermosflask, which do not share its mass and temperature with her surroundings.

yes the answer is total mass in unchanged   : )