According to table i, which equation represents a change resulting in the greatest quantity of energy released?
1. 2c(s) + 2h2(g) -> c2h4(g)
2. 2c(s)+3h2(g) -> c2h6(g)
3. n2(g) +3h2(g)-> 2nh3(g)
4. n2(g)+o2(g) -> 2no(g)

3. N2(g) +3H2(g)->2NH3(g)

Explanation:

Reactions can be broadly classified as endothermic and exothermic reactions. In the former, energy or heat is absorbed by the reactants and the enthalpy change of the reaction is positive. In the later, heat is released ans the enthalpy change of the reaction is negative.

For the given reactions, the enthalpy change or ΔH values are:

1. 2C(s) + 2H2(g) -> C2H4(g)        ΔH = +52.4 kJ

2. 2C(s)+3H2(g) -> C2H6(g)         ΔH = -84 kj

3. N2(g) +3H2(g)->2NH3(g)          ΔH = -91.8 kJ

4. N2(g)+O2(g) -> 2NO(g)            ΔH = +182.6 kJ

Reactions 1 and 4 are endothermic while reactions 2 and 3 are exothermic in which heat is released.

More negative the ΔH value, greater is the amount of heat released.

Thus, reaction 3, represents a change resulting in the greatest quantity of energy released

solute : a solute is a substance that is dissolved in another substance is known as a solvent. it is mixed with a special mixture know as homogeneous mixture.

solvent: a solvent is a substance that dissolved a solute, which results in a solution is known as solvent.

that's what i got you can count the number of atoms