A chemical engineer is studying the gas-phase decomposition of dinitrogen pentoxide into nitrogen dioxide and oxygen:
2N2O5(g)→4NO2(g)+O2(g) 2\text{N}_2\text{O}_5\text{(g)} \rightarrow 4\text{NO}_2\text{(g)} + \text{O}_2\text{(g)} 2N2O5(g)→4NO2(g)+O2(g)She measures the rate of reaction at 280 K and then at 350 K, noting that the rate is substantially higher at 350 K.
Explain, in terms of collision theory, why the rate of reaction increases when the temperature is raised from 280 K to 350 K.
127 exam-style questions on Edexcel GCSE Chemistry 8.1 Rates of reaction, covering 8.1.1 Measuring and interpreting rates of reaction, 8.1.2 Collision theory and the factors affecting rate, and 8.1.3 Catalysts and enzymes. Each one has a worked solution and a mark scheme showing where the marks go.