On a 5 day wilderness expedition you'll need to heat 3.0kg of water to the boiling point each day. The air temperature will average 25°C. You have available canisters of compressed propane C3H8 fuel, which you'll burn to heat the water. Each canister has 100.g of propane in it. What is the minimum number of fuel canisters you must bring? The standard heat of formation of propane at 25°C is −103.85/kJmol.

18

PROBLEM 2 In general, the disposal of hot streams to the environment is not a good a practice due to the risk of violating EPA regulations and also, it represents as waste of potential useful energy. For example, raising the temperature of lakes, rivers, and atmosphere have negative consequences on the ecosystems. In this problem, a gas stream at 500°C contains eight percent mole carbon monoxide and the balance carbon dioxide. Before disposing this gas mixture stream into the atmosphere, it makes sense to recover some of its energy first. To achieve this we will use a heat exchanger where the gas stream flows across the tubes. Water flows inside the tubes entering at 25°C and it is fed at a ratio of 0.2 mole water per mole of the hot gas. The water is heating to its boiling point forming saturated steam at five bar. The steam produced can be used for heating or power generation in the facilities or as the feed for another unit operation. You can assume that heat exchanger is thermally…