Consider the reaction: Fe3+(aq) + SCN−(aq) ⇌ Fe(SCN)2+(aq)A mixture is prepared with initial Fe3+ and SCN- concentrations of 0.3 M and 0.005 M, respectively. Given that the product concentration at equilibrium is 0.00494 M, calculate the equilibrium constant Keq.

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.