Determine the value for the following reaction. n2(g) + 3h2(g) → 2nh3(g)+ 22,000 cal î”h = 22,000 kcal -22,000 kcal 22 kcal -22 kcal

ΔH = -22 kcal

Step-by-step explanation:

N₂(g) + 3H₂(g) ⇌ 2NH₃(g) + 22 000 cal

Energy is on the right-hand side of the equation, so it is being released by the system.

The thermodynamic convention is that energy going out of a system is negative. Thus,

ΔH = -22 000 cal     Convert to kilocalories

ΔH = -22 kcal

A and B are both wrong, because you divide by 1000 to convert calories to kilocalories.

C is wrong, because the sign must be negative for an exothermic reaction.

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

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