1. You have 2kg of liquid water at 10. What is its enthalpy according to a basis of pure elements having 0 enthalpy at 25? How much energy would it require to heat this water up to 25C?

2. You have 3l of water at 25. How much energy is required to heat it to 100C?

3. You have 8kg of liquid water at 25. How much energy is required to convert it all into water vapour at 25?

4. You have 8kg of liquid water at 25. How much energy is required to convert it all into water vapour at 100?

5. You have 8kg of liquid water at 100. How much energy is required to convert it all into water vapour at 100?

6. You have 2l of water at 25C. You heat it and then boil it in a kettle. After 10 minutes, there are 1.7l of water remaining, at 100C. What is the power of the kettle?