Balance the following equation: __C3H8 __O2 __CO2 __H2O propane + oxygen  carbon dioxide + water
and answer questions #15 & #16 based on the balanced equation.
15. How many dm3 of oxygen at STP would be required to react completely with 38.8g of propane? (3 marks)
** 1dm3 = 1000mL
16. How many grams of water can be generated from the combustion of 40.0g of propane in an excess of oxygen? (3 marks)

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

0.88m hope i am correct : )