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The buring of magnesium may be represent...

The buring of magnesium may be represented by:
`2Mg(s) +O_(2)(g) rarr 2MgO(s), DeltaH^(Theta) =- 1204 kJ (mol O_(2))^(-1)`
Which one of the following correctly descride what would happen if the reaction were allowed to proceed at constant external pressure in such a way that no enegry transfer could taken place between the reaction mixture and its surroundings?

A

No reaction could occur.

B

The tempertaure of the reaction mixture would increase.

C

The temperature of the reaction mixture would decrease.

D

The pressure of the system would increase.

Text Solution

Verified by Experts

In combustion, heat evolved, hence temperature of system will increase.
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