Look at the chemical equation shown below. a, b, x, and y represent different elements.

ax + by → bx + ay

which of the following types of reactions is represented by this equation?

a single replacement reaction
a double replacement reaction
a decomposition reaction
a synthesis reaction

girl imma just put my comment here because i need a couple point okurrttt

option c: 1605.1 kj

the balanced chemical reaction for combustion of methane is as follows:

here, enthalpy formation of is -74.7 kj/mol, 0 kj/mol, -393.5 kj/mol and -241.82 kj/mol respectively.

the heat released or can be calculated as follow:

putting the values,

thus, heat released by combustion of 1 mol of methane is 802.54 kj/mol. thus, for 2 mol, heat released will be:

therefore, heat released by the combustion of 2 mol of methane is 1605.1 kj.