Give an example of a reaction where the following are involved:

(a) Evolution of heat

(b) Absorption of heat

(c) High pressure is required

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Solution

(a) $C$ + $O_{2}$ $\to$ $C O_{2}$ + $h e a t$

(b) $C$ + $2 S$ $h e a t - - \to$ $C S_{2}$

(c) $N_{2}$ + $3 H_{2}$ $above 200 atm ⇋$ $2 N H_{3}$

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Give an example of a reaction where the following are involved: (a) Evolution of heat (b) Absorption of heat (c) High pressure is required

(a) C + O2 → CO2 + heat (b) C + 2S heat−−→ CS2 (c) N2 + 3H2 above 200 atm ⇋ 2NH3

Give an example of a reaction where the following are involved:

(a) Evolution of heat

(b) Absorption of heat

(c) High pressure is required

(a) $C$ + $O_{2}$ $\to$ $C O_{2}$ + $h e a t$

(b) $C$ + $2 S$ $h e a t - - \to$ $C S_{2}$

(c) $N_{2}$ + $3 H_{2}$ $above 200 atm ⇋$ $2 N H_{3}$