Question

how many calories are required to heat 100.0 g of water from -15.0 °c to 115.0 °c? without doing any calculations, which of the following conversion factors would be needed? 1 warm the solid 2 melt the solid 3 heat the liquid 4 vaporize the liquid 5 heat the vapor a. use b. dont use

Explanation:

1. For warming the solid (from - 15.0°C to 0°C), the specific heat capacity of ice (solid water) is needed. So we use the conversion factor for warming the solid.
2. To melt the solid (at 0°C), the heat of fusion of water is required. So we use the conversion factor for melting the solid.
3. For heating the liquid (from 0°C to 100°C), the specific heat capacity of liquid water is needed. So we use the conversion factor for heating the liquid.
4. To vaporize the liquid (at 100°C), the heat of vaporization of water is required. So we use the conversion factor for vaporizing the liquid.
5. For heating the vapor (from 100°C to 115.0°C), the specific heat capacity of water vapor is needed. So we use the conversion factor for heating the vapor.

Answer:

1. A. use
2. A. use
3. A. use
4. A. use
5. A. use