1. The total energy required to complete a reaction can be measured. It is large
ID: 20042 • Letter: 1
Question
1. The total energy required to complete a reaction can be measured. It is larger than the energy state of the products (or the reactants). Pick from the following the statement that is false.A. Enzymes such as catalase speed up a reaction by lowering the activation energy
B. Enzymes can speed up reactions by increasing surface area of the reactants, which lowers the activation energy
C. Enzymes can raise the temperature of a reaction which will speed up the reaction
A small amount of catalase can help a large amount of hydrogen peroxide break down
2. H2O2 ? H2O +
Explanation / Answer
Hi!
1. The total energy required to complete a reaction can be measured. It is larger than the energy state of the products (or the reactants). Pick from the following the statement that is false.
C. Enzymes can raise the temperature of a reaction which will speed up the reaction
Explanation: Enzymes speed up the rate of biochemical reactions by lowering activation energy (in one way or another) thus all the other answers are plausible. Enzymes do not affect physical states such as Temperature.
2. H2O2 H2O + ½O2
is the reaction involving the decomposition of hydrogen peroxide in this lab. When the reaction runs to completion with 1 mole of hydrogen peroxide, how would you expect the volume of the liquid in the reaction flask to change?
C. As oxygen is produced the liquid level stays the same; the same number of moles are present before and after the reaction
Explanation: The problem indicates that 1 mole of H2O2 reacting produces 1 mole of H2O and that water has a lower density than H2O2. Although the product solution is lower density, it takes up the same space (1 mole -> 1 mole).
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