Type the correct answer in the box. express the answer to three significant figures. given: ch4 + 2o2 → co2 + 2h2o, δh = -890 kj/mol how much energy is released when 59.7 grams of methane (ch4) reacts with oxygen? the combustion of 59.7 grams of methane releases 34.5 kilojoules of energy.

Answer : The energy released is -3319.7 KJ.

Solution : Given,

Mass of methane = 59.7 g

Molar mass of methane = 16 g/mole

The value of is in negative that means the energy is releasing.

First we have to calculate the moles of methane.

Moles of methane =

Now we have to calculate the amount of energy released.

The given reaction is,

From the reaction, we conclude that

1 mole of methane releases -890 KJ/mole of energy

3.73 moles of methane releases of energy

Therefore, the energy released is -3319.7 KJ.