Question

Given the following unbalanced thermochemical equation, how much heat will be released from the combustion of 45.5 grams of CH4 in an excess of oxygen gas?

CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) + 890 kJ

Answer 1

2530kJ

Step-by-step explanation:

Answer 2

Heat released from the combustion of 45.5 grams of CH4 in excess oxygen gas is calculated as follows

calculate the number of CH4 moles used = mass/molar mass
= 45.5 grams/ 15 g/mol =2.84 moles

heat released is therefore= moles x 890 kj

= 2.84 x 890=2527.6 kj/mol