Chemistry 1B PASS W10

What factors affect reaction rate?

• temperature

• physical state

• concentration

• all of the above

What are the two types of reaction rates?

• Fast and slow

• Average and instantaneous

• High and low

• Constant and variable

What factors are important for reactions involving gases?

• Viscosity and miscibility

• Contact surface area

• Total pressure and temperature

• Colour and odour

Which of the following factors influences reaction rates by affecting the energy and movement of particles?

• physical states

• temperature

• concentration of reactants

• presence of catalysts

How would we quantify reaction speed?

• By measuring the change in concentration over time

• By observing the colour change

• By checking the temperature

• By noting the smell

What role do catalysts play in influencing reaction rates?

• They increase the concentration of reactants

• They change the physical state of reactants

• They lower the activation energy needed for the reaction

• They increase the temperature of the reaction

How does the concentration of reactants affect the reaction rate?

• higher concentration decreases the rate

• no effect

• higher concentration increases the rate

• lower concentration increases the rate

Which factor is related to the physical form of the reactants in a chemical reaction?

• temperature

• physical states

• presence of catalysts

• concentration of reactants

What type of reaction involves multiple phases?

• homogenous

• heterogenous

• exothermic

• endothermic

Which factor is important for reactions involving solids?

• viscosity

• contact surface area

• total pressure

• temperature