Question

If you add a 15 gram piece of metal at a temperature of 105° Celsius to a sample of 100 grams of water at 25° Celsius inside a calorimeter, what best describes what will occur? The temperature gained by the water will equal the temperature lost by the metal. The thermal energy lost by the metal will equal the thermal energy gained by the water. The final temperature of the water will be 75° Celsius. The final temperature of the water will be more than 80° Celsius.

Answer 1

the temp gained by the water will equal the temp lost by the metal. 

Answer 2

The thermal energy lost by the metal will equal the thermal energy gained by the water.

Step-by-step explanation:

If we add some amount of a metal piece at a higher temperature to 100g of water at lower temperature, the water will absorb some heat from metal which is the heat loss by metal. Thus the thermal energy lost by the metal will equal the thermal energy gained by the water.

The change in temperature (gained by water or lost by metal) will be different, as it will depend upon the mass of substance and the specific heat of substance. However after some time they both will reach the same temperature.