Engineering Board Exam Reviewer · Chemistry · medium

A common rule of thumb is that the rate of many reactions roughly doubles for every:

  1. 10 °C rise in temperature
  2. 1 °C rise in temperature
  3. 100 °C rise in temperature
  4. Doubling of pressure

Answer

A. 10 °C rise in temperature

Solution

This follows from the Arrhenius equation for typical activation energies.

More Chemistry questions

  1. If doubling the concentration of a reactant quadruples the reaction rate, the reaction is:
  2. If doubling the concentration of a reactant doubles the reaction rate, the reaction is:
  3. A first-order reaction has a rate constant of 0.0231 min-1. What is its half-life?
  4. For a first-order reaction, the half-life:
  5. The K sp of AgCl is 1.8 × 10-10. What is its molar solubility in pure water?
  6. The molar solubility of a salt MX2 is 1 × 10-4 M. What is its K sp?
  7. At equilibrium for N2 + 3 H2 2 NH3, the concentrations are [ N2] = 0.2 M, [ H2] = 0.6 M and [ NH3] = 0.4 M. What is Kc?
  8. Adding a catalyst to a reaction at equilibrium:
  9. For the exothermic reaction N2 + 3 H2 2 NH3, increasing the temperature will:
  10. For the reaction N2(g) + 3 H2(g) 2 NH3(g) (exothermic), increasing the pressure will:

All Chemistry Reviewer questions