Question 1
An average home in Colorado requires 20. GJ of heat per month. How many grams of natural gas (methane) must be burned to supply this energy?
CH
4(g) + 2O
2(g) → CO
2(g) + 2H
2O(l) ΔH°
rxn= –890.4 kJ/mol
◦ 7.1 × 10
–4 g
◦ 1.4 × 10
3 g
◦ 1.4 × 10
4 g
◦ 2.2 × 10
4 g
◦ 3.6 × 10
5 g
Question 2
An endothermic reaction causes the surroundings to
◦ warm up.
◦ become acidic.
◦ condense.
◦ decrease in temperature.
◦ release CO
2.