Question

question 1 of 10
how does increasing the pressure affect the reaction rate?
a. the concentration of reactants is changed
b. the phase the reactants are in is changed
c. the activation energy of the reaction is changed
d. the temperature of the reaction is changed

Explanation:

Increasing pressure (for gaseous reactions) changes the concentration of reactants (since \(PV = nRT\) and \(C=\frac{n}{V}\)). Higher concentration leads to more frequent collisions, affecting reaction rate. Phase change (B) is not directly due to pressure change in the context of reaction rate (unless extreme). Activation energy (C) is affected by catalysts, not pressure. Temperature (D) is a separate variable; pressure change doesn't directly change temperature in the way described here for reaction - rate - related pressure effects.

Answer:

A. The concentration of reactants is changed