Module 3.2- Enthalpy Of Combustion

Question 1

Definition of standard enthalpy change of combustion

Answer 1

When 1 mole of substance burns completely in excess oxygen under standard conditions

Question 2

What are standard conditions??

Answer 2

298K and 101KPa

Question 3

Equation for working out energy during combustion

Answer 3

Energy = M x C x 🔼T

M= mass of water (not fuel)
C= specific heat capacity of water (not fuel)
🔼T= change in temperature

Question 4

How do you work out energy per mole??

Answer 4

1) concert joules into KJ

2) divide this by number of moles of substance