Question

given the reaction:
magnesium + water - magnesium hydroxide + hydrogen
at which temperature will the reaction occur at the greatest rate?
25 degrees celsius
100 degrees celsius
50 degrees celsius
75 degrees celsius

Explanation:

Step1: Understand the effect of temperature on reaction rate

According to the collision - theory, as temperature increases, the kinetic energy of reactant molecules (magnesium and water molecules in this case) increases. This leads to more frequent and energetic collisions.

Step2: Compare the given temperatures

Among the given temperatures \(25^{\circ}C\), \(50^{\circ}C\), \(75^{\circ}C\) and \(100^{\circ}C\), higher temperature means more kinetic energy for the reactant molecules.

Answer:

100 degrees Celsius