8. The compound 1,2-diaminoethane, HNCHCH, NH,, is a bidentate ligand; in formulae, it is usually abbreviated to ‘en'.
When 1,2-diaminoethane is added to [Co(NH)]* in aqueous solution,
[Co(en)3]2+ is formed. What is the best explanation for this?

answer: i dont know the answer but this might

explanation:

l

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.