Ahypothetical substance has a melting point of −10°c and a boiling point of 155°c. if this substance is heated from 2°c to the gas at 155°c, which of the following would be used in the calculation:
1. specific heat capacity of the solid
2. heat of fusion
3. specific heat capacity of the liquid
4. heat of vaporization
5. specific heat capacity of the gas

Option 3. Specific heat capacity of the liquid

Explanation:

Let's think, the states for the substance.

In -10, substance turns from solid state to liquid, so at 2°C , state is liquid.

We have to take from liquid state at 2°C to 155°C, which is the boiling point.

As the substance doesn't change its state, we only have to apply the specific heat capacity of the liquid.

1. specific heat capacity of the solid → This is used, when the substance is solid.

2. Heat of fusion → Only used when you turn from liquid to solid

4. Heat of vaporization → Used when the substance changes its state from liquid to gas

5. specific heat capacity of the gas → Used when the substance is a gas.