This is the question from may June 2008 paper 1. Titanium occurs naturally as the mineral rutile, TiO2. One possible method of extraction of
titanium is to reduce the rutile by heating with carbon.
TiO2(s) + 2C(s) → Ti(s) + 2CO(g)
The standard enthalpy changes of formation of TiO2(s) and CO(g) are –940 kJ mol–1 and
–110 kJ mol–1 respectively.
What is the standard enthalpy change of this reaction?
A –830 kJ mol–1
B –720 kJ mol–1
C +720 kJ mol–1
D +830 kJ mol–1
titanium is to reduce the rutile by heating with carbon.
TiO2(s) + 2C(s) → Ti(s) + 2CO(g)
The standard enthalpy changes of formation of TiO2(s) and CO(g) are –940 kJ mol–1 and
–110 kJ mol–1 respectively.
What is the standard enthalpy change of this reaction?
A –830 kJ mol–1
B –720 kJ mol–1
C +720 kJ mol–1
D +830 kJ mol–1
