Chemistry - Chemical Kinetics Question with Solution | TestHub
ChemistryChemical KineticsFirst-order kineticsHard2 minQB
ChemistryHardsingle choice
For the first-order gas-phase decomposition A(g) → B(g) + C(g), the initial pressure is pᵢ and the total pressure after time t is pₜ = pᵢ + x. What is the rate constant k?
Options:
Answer:
B
Solution:
The pressure rise x = pₜ − pᵢ equals the extent of decomposition, so A remaining is pᵢ − x = 2pᵢ − pₜ. The first-order integrated law gives k = (2.303/t) log[pᵢ/(2pᵢ − pₜ)]. In A, pₜ − x equals pᵢ and gives log 1 = 0, not the rate constant.
Stream:JEESubject:ChemistryTopic:Chemical KineticsSubtopic:First-order kinetics
⏱ 2mℹ️ Source: QB
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