Question 1
How much heat (kJ) is evolved when 4.50 g of Fe
2O
3 is reacted with excess carbon monoxide using the equation below?
Fe
2O
3(s) + 3CO(g) → 2 Fe(s) + 3 CO
2(g) ΔH°
rxn = – 24.8 kJ/mol,
◦ 0.699 kJ
◦ 2.10 kJ
◦ 17.9 kJ
◦ 24.8 kJ
◦ 112 kJ
Question 2
How much heat is required to raise the temperature of 1.5 x 10
3 g of water from 45°F to 130.°F? The specific heat of water is 4.184 J/g·°C.
◦ 3.0 x 10
1 kJ
◦ 3.0 x 10
2 kJ
◦ 3.4 x 10
2 kJ
◦ 5.3 x 10
2 kJ
◦ 8.2 x 10
2 kJ