Topic 5 - Calculating Enthalpy Changes

Question 1

what is the equation for heat energy transferred?

Answer 1

heat energy transferred = mass of liquid x specific heat capacity x temperature change

Question 2

what is water’s specific heat capacity?

Answer 2

4.2

Question 3

how do you calculate molar enthalpy change?

Answer 3

1. calculate heat energy change
2. calculate how many moles of fuel produced this energy change using the equation: mass (g)/Mr
3. divide the heat energy change by the number of moles