Which of the following constants are needed to calculate the change in enthalpy (�H) for heating a sample of liquid water at 10C to steam at 150C.

I) the heat capacity of water
II) the enthalpy of fusion of water
III) the heat capacity of ice
IV) the enthalpy of vaporization of water
V) the heat capacity of steam

1. II and III only
2. I, II and III only
3. I, II, III, IV and V
4. I and III only
5. I and V only
6. I, II, IV and V only

Nope, it was 10 degrees C, which is why I'm stumped. I didn't think any of the answer choices were right, either.

Did you make a typo in the problem? I don't see any correct answer as written; however, if the 10C actually is -10C, there is an answer.

To change T within a state heat needed is
q = mass x specific heat x delta T.

To change the state at some T the heat is
q = mass x heat fusion/vaporiation depending upon if you are going from ice to liquid water or from liquid water to steam. I would look at

Nevermind, the correct answer was at the top of the next page so I didn't see it.

Thanks for letting me know.

To calculate the change in enthalpy (ΔH) for heating a sample of liquid water at 10°C to steam at 150°C, you need the following constants:

I) The heat capacity of water: The heat capacity of water is needed to calculate the amount of heat energy required to raise the temperature of liquid water from 10°C to its boiling point at 100°C.

II) The enthalpy of fusion of water: The enthalpy of fusion is the amount of heat energy required to convert a given amount of solid water (ice) to liquid water at its melting point (0°C).

III) The heat capacity of ice: The heat capacity of ice is needed to calculate the amount of heat energy required to raise the temperature of ice from its melting point to 10°C.

IV) The enthalpy of vaporization of water: The enthalpy of vaporization is the amount of heat energy required to convert a given amount of liquid water at its boiling point to steam at the same temperature.

V) The heat capacity of steam: The heat capacity of steam is needed to calculate the amount of heat energy required to raise the temperature of steam from its boiling point to 150°C.

Based on these explanations, the correct answer is 6. I, II, IV, and V only.