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.

The buring of magnesium may be represented by: `2Mg(s) +O_(2)(g) rarr

1.	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.
Answer» In combustion, heat evolved, hence temperature of system will increase.

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