Question

1. what is activation energy?

a. what role do enzymes play regarding activation energy?

1. using the graph, what is the temperature required for maximum enzyme effectiveness?
2. using the graph, what will happen to the enzymes effectiveness if the solution is heated 55°c?

a). why?

Explanation:

1. Activation energy is the minimum amount of energy that reactants must possess to undergo a chemical reaction. Enzymes are biological catalysts that lower the activation - energy barrier, thus increasing the rate of the reaction.
2. By observing the graph, the temperature at which the rate (which can be an indicator of enzyme effectiveness) is maximum is 40°C.
3. When the solution is heated to 55°C, the enzyme's effectiveness decreases. This is because high temperatures can cause the enzyme (a protein) to denature, altering its three - dimensional structure and thus reducing its ability to catalyze reactions.

Answer:

1. Activation energy is the minimum energy required for reactants to react. Enzymes lower activation energy.
2. 40°C
3. The enzyme's effectiveness decreases. Because high temperatures can denature the enzyme.