The pressure inside of a container decreases if you pump gas out 3.
A 1.00 L volume of dry air is sealed inside of a round flask and brought to a temperature of 50.0°C in
a hot water bath. If the pressure gauge reads 3.60 atm, how many moles of gas are in the sample of
air?

The combustion of methane, ch4, releases 890.4kj/mol. that is, when one mole of methane is burned,890.4 kj are given off to the surroundings. this meansthat the products have 890.4 kj less than the reactants.thus, ah for the reaction = - 890.4 kj. a negative symbolforah indicates an exothermic reaction.ch (g) + 20 (g)> co2 (g) + 2 h0 (1); ah = - 890.4 kga) how much energy is given off when 2.00 mol of ch,are burned? b) how much energy is released when 22.4g of ch. areburned?