This calculation shows that burning grams of methane (takes in/gives off) energy

The question lacks some details in order to be answered. Nevertheless, let's just give some examples.

Given that you are to burn 10 kg of methane (CH4) from 0 to 20°C. The specific heat capacity of methane is 4.475 kJ/kg-K.

H = mCpT
H = (10kg)( 4.475 kJ/kg-K)(20-0)
H = 895.00 kJ

Because of the positive value of enthalpy, methane takes in heat. 

Hiii :))) dont stress, whatever you’re going through i promise it will get better!!!