Measuring the specific latent heat of vaporization of water

In this video, we shall talk about an experiment to measure the specific latent heat of vaporization of water. We shall introduce the experimental setup and mention how the limitations of the experiment will affect the final result.

[cappilau]

1. Use a polystyrene cup instead of a beaker to prevent heat loss.
2. Use a taller cup to prevent water from spilling out (but finding the right cup may be hard).
3. Wrap some tissue paper/pieces of towel on the clamp, the handle of the heater, and on the edges of the beaker to prevent water from draining back...hopefully holding it for a while.

[waihinng]

We may use a polystyrene cup to store the water so that less energy is lost to the surroundings

[thomaschung]

Use a expanded polystyrene cup (with a lid)to store the water.It can prevent heat loss to the surrounding and the water spill out of the cup. It can also prevent steam to condense on the clamp and the cup itself.

[lisama]

Wrap the beaker with cotton wool to prevent heat loss
Place a piece of kitchen on top of the beaker to abort steam and avoid water droplet drain back
Fill the beaker with only one-third full of water to avoid the water bubble out

[caconutnuts]

Why was water boiled away before adding the mass?

[cmleung]

use bigger polystyrene cup to lower the heat loss to surrounding and water drip out

[happibirthdayu]

1.Use polystyrene cup instead of beaker.
2.Use less water to prevent it bubbles out.

[davidlynch]

I think using a caloriemeter could work better