- #1

Robsta

- 88

- 0

## Homework Statement

When lead is melted at atmospheric pressure, the melting point is 600K, the density decreases from 1.101x10

^{4}to 1.065x10

^{4}kgm

^{-3}. The latent heat is 24.5 kJ kg

^{-1}

Estimate the melting point of lead at a pressure of 100 atm.

## Homework Equations

I haven't been able to find any equations for how the melting of a solid varies with pressure. Intuitively I'd say the melting point will go down, but that's really just a guess.

## The Attempt at a Solution

If the density decreases, the material expands. This means it is doing work on the surroundings, so some energy that goes in does that. I looked at some data from a paper (not what the question wants) that tells me that the melting point of lead goes up as pressure goes up in the range of 800 to 1200 MPa.