drama analysis quiz

📚 Quick Study Guide

• ⚛️ Chemical kinetics studies reaction rates and factors influencing them.
• ⏱️ Reaction rate is the change in concentration of reactants or products per unit time.
• 🌡️ Factors affecting reaction rates: temperature, concentration, surface area, catalysts.
• 📈 Arrhenius equation: $k = Ae^{-\frac{E_a}{RT}}$, where $k$ is the rate constant, $A$ is the pre-exponential factor, $E_a$ is the activation energy, $R$ is the gas constant, and $T$ is the temperature.
• ⚙️ Catalysts increase reaction rate by lowering activation energy without being consumed.
• 📝 Rate law expresses the relationship between reaction rate and reactant concentrations: Rate = $k[A]^m[B]^n$.
• 🪜 Reaction order (m, n) determines how concentration affects rate; can be zero, first, second order, etc.

🧪 Practice Quiz

1. Which factor does NOT typically affect the rate of a chemical reaction?
   1. Temperature
   2. Concentration of reactants
   3. Presence of a catalyst
   4. Color of reactants
2. According to the Arrhenius equation, what happens to the rate constant (k) as temperature (T) increases?
   1. k increases
   2. k decreases
   3. k remains constant
   4. k becomes zero
3. What is the role of a catalyst in a chemical reaction?
   1. It increases the activation energy.
   2. It decreases the activation energy.
   3. It shifts the equilibrium towards the reactants.
   4. It gets consumed in the reaction.
4. For a reaction A → B, if doubling the concentration of A quadruples the reaction rate, what is the order of the reaction with respect to A?
   1. Zero order
   2. First order
   3. Second order
   4. Third order
5. What does the pre-exponential factor (A) in the Arrhenius equation represent?
   1. Activation energy
   2. Frequency of collisions
   3. Rate constant at 0 Kelvin
   4. Gas constant
6. Which of the following is the correct rate law for an elementary reaction $2A + B \rightarrow C$?
   1. Rate = $k[A][B]$
   2. Rate = $k[A]^2[B]$
   3. Rate = $k[C]$
   4. Rate = $k[A]^2[B]^2$
7. What unit is commonly used to express reaction rate?
   1. mol/L·s
   2. L/mol·s
   3. s/mol·L
   4. mol·L/s