1. Clean and dry a round-bottom flask.

2. Add a small piece of lithium (about the size of a pea) to the flask.

3. Attach a condenser to the flask and heat it gently until the lithium melts and begins to react with the hydrogen gas.

4. Continue heating the flask until the reaction is complete (about 1 hour).

5. Allow the flask to cool and then carefully open it.

6. Remove the lithium hydride from the flask and store it in a sealed container.

Method 2: Reaction of Lithium Nitride with Hydrogen

1. Clean and dry a round-bottom flask.

2. Add a small amount of lithium nitride to the flask.

3. Attach a condenser to the flask and heat it gently until the lithium nitride begins to decompose and release hydrogen gas.

4. Continue heating the flask until the reaction is complete (about 1 hour).

5. Allow the flask to cool and then carefully open it.

6. Remove the lithium hydride from the flask and store it in a sealed container.

Note: Both of these methods can be dangerous if not performed correctly. It is important to use proper safety precautions when working with lithium and hydrogen gas.