Question

How much heat is produced by burning 4.00 moles of acetylene under standard conditions?

Short answer

The heat produced by burning 4 mol of acetylene under standard conditions is 5204.4 kJ.

Step-by-step solution

Reaction of acetylene with oxygen

Note that the enthalpy of combustion ofacetylene (∆H) = -1301.1 kJ/mol.

The equation representing the burning of 1mol of acetylene is:

C₂H₂(g) + O₂ --> CO₂(g) + H₂O(l)

Calculation of heat

Enthalpy of combustion of acetylene is -1301.1 kJ/mol.

The heat produced by burning 1 mol of acetylene under standard conditions = -1301.1kJ/mol.

Therefore, the heat produced by burning 4mol of acetylene under standard conditions

= 4 × (-1301.1 kJ)

= -5204.4 kJ