Give two examples of hetergeneous catalysis.

Explanation

To answer the question about examples of heterogeneous catalysis, we can follow these steps:

### Step 1: Define Heterogeneous Catalysis
Heterogeneous catalysis refers to a process in which the catalyst is in a different phase (solid, liquid, or gas) than the reactants. This typically involves a solid catalyst and gaseous or liquid reactants.

### Step 2: Provide the First Example
One well-known example of heterogeneous catalysis is the Haber process for the synthesis of ammonia (NH3). In this process, nitrogen gas (N2) reacts with hydrogen gas (H2) in the presence of a finely divided iron catalyst. The reaction can be represented as:
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