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Answered by
3
Answer:
option 3.
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Answered by
1
Answer:
3
Explanation:
because enthalphy of formation is defined as amount of heat evolved or absorbed when one mole of a compound is formed from its constituent elements in their standard state.
in 3 option you can observe that CO is not an element its a molecule
and in 2nd option its given that enthalpy of formation of co2 is equal to enthalpy of combustion of c which is also right
coz enthalpy of combustion is heat evolved when 1mole of a substance burned in excess of o2
hope you understood mate!!
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