Question

if we know that manganese dioxide is a catalyst in the decomposition of hydrogen peroxide, then how does manganese dioxide affect this reaction? it lowers the activation energy required for the decomposition to proceed. it makes the decomposition happen without any activation energy. it changes the decomposition from exothermic to endothermic. it raises the activation energy required for the decomposition to proceed.

Answer 1

Manganese dioxide acts as a catalyst in the decomposition of hydrogen peroxide by lowering the activation energy of the reaction, speeding up the process without being consumed or changing the exothermic nature of the reaction.

Step-by-step explanation:

When manganese dioxide is added to hydrogen peroxide, it acts as a catalyst in the decomposition of hydrogen peroxide. The presence of manganese dioxide lowers the activation energy required for the decomposition to proceed. It achieves this by providing an alternative mechanism for the reaction, which has a lower energy barrier, thus causing the reaction to happen more rapidly.

The decomposition of hydrogen peroxide into water and oxygen gas is a reaction that would normally be very slow. However, with the addition of manganese dioxide, the decomposition happens quickly and efficiently while the manganese dioxide remains unchanged, ready to catalyze the reaction again. This catalytic function exemplifies how catalysts work by lowering activation energy without being consumed in the reaction, and without altering the exothermic or endothermic nature of the reaction.

Answer 2

The manganese dioxide affect this reaction a) it lowers the activation energy required for the decomposition to proceed. Therefore, a) it lowers the activation energy required for the decomposition to proceed is correct.

Manganese dioxide (MnO2) serves as a catalyst in the decomposition of hydrogen peroxide (H2O2), playing a crucial role in facilitating the reaction.

The decomposition of hydrogen peroxide is a process where hydrogen peroxide breaks down into water (H2O) and oxygen (O2).

The presence of manganese dioxide alters the reaction pathway, specifically by lowering the activation energy required for the reaction to occur.

Activation energy is the energy needed to initiate a chemical reaction. In the case of hydrogen peroxide decomposition, this energy barrier can be substantial.

Manganese dioxide functions as a catalyst by providing an alternative reaction pathway with a lower activation energy.

This allows the hydrogen peroxide molecules to react more readily, leading to a faster decomposition into water and oxygen.

It's essential to note that manganese dioxide doesn't eliminate the need for activation energy altogether, and the decomposition remains an exothermic process, releasing heat as a byproduct.

Additionally, manganese dioxide does not raise the activation energy; instead, it facilitates the reaction by making it energetically more accessible.

Manganese dioxide acts as a catalyst in the decomposition of hydrogen peroxide, lowering the activation energy required for the reaction to proceed efficiently and accelerating the overall process.

Question

if we know that manganese dioxide is a catalyst in the decomposition of hydrogen peroxide, then how does manganese dioxide affect this reaction?

a) it lowers the activation energy required for the decomposition to proceed.

b) it makes the decomposition happen without any activation energy.

c) it changes the decomposition from exothermic to endothermic.

d) it raises the activation energy required for the decomposition to proceed.