The rate of disappearance of HBr in the gas phase reaction 2HBr (g) → H₂ (g) + Br₂ (g)
Is 0.130 Ms^-1 at 150°C. The rate of reaction is __________ Ms^-1.

Question

The rate of disappearance of HBr in the gas phase reaction 2HBr (g)→ H₂ (g)+ Br₂ (g) Is 0.130 Ms^-1 at 150°C. The rate of reaction is __________ Ms^-1.

Quizplus · Accepted Answer

According to the balanced equation, the reaction rate is the same as the rate of disappearance of HBr. Therefore, the rate of reaction is 0.130 M/s. However, we need to divide this value by the stoichiometric coefficient of HBr (which is 2) to obtain the rate of reaction per unit concentration of HBr. Dividing 0.130 M/s by 2 gives a rate of reaction of 0.0650 M/s. Therefore, the answer is B.

The Rate of Disappearance of HBr in the Gas Phase