Calculate AH° for the follow- ing reactions.
a. Br2(g) → Br2(1)
b. CaCO3(s)
Cao(s) + CO2(g
c. 2NO(g) + O2(g)
2NO2(g)

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder

An excess of lithium oxide undergoes a synthesis reaction with water to produce lithium hydroxide li2o+h2o→2lioh if 1.05 g of water reacted, what is the theoretical yield of lithium hydroxide? a) 5.83 x 10–2 g lioh b) 1.17 x 10–1 g lioh c) 2.79 x 100 g lioh d) 1.40 x 100 g lioh

Hydrogenation reactions, in which h2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. in the simplest case, ethene (c2h4) and h2 form ethane (c2h6). if 140 kj is given off per mole of c2h4 reacting, how much heat (in mj) is released when 12 kg of c2h6 forms?