Question on enthalpy changeWatch
1. How will you be able to deduce that the Mr of coal is just 12 g mol^-1? You are not told the molecular formula for it .
2. The answer suggests that you will work out the heat loss q from the moles of coal * by the enthalpy change of combustion but I don't understand why. Why is q of coal = q of water ?
The question says assume coal is pure carbon. Carbon is in the periodic table!
Also can you help me with my second question?