Water Melting Temperature Point Pressure

Overview

Engineering reference data for Water Melting Temperature Point Pressure in material science and properties.

Key Formulas

Stress

$\sigma = \frac{F}{A}$

Force per unit area.

Strain

$\varepsilon = \frac{\Delta L}{L_0}$

Change in length per original length.

Hooke's Law

$\sigma = E \varepsilon$

Stress proportional to strain in elastic region.

Thermal Expansion

$\Delta L = \alpha L_0 \Delta T$

Length change due to temperature.

Variables

Pressure-Temperature Relationship

The melting point of water decreases as pressure increases. This behavior is opposite to most substances and is a consequence of the fact that liquid water is denser than solid ice (ice Ih). Applying pressure favors the denser phase, which for water is the liquid.

The relationship is governed by the Clausius-Clapeyron equation for the solid-liquid phase boundary: $\frac{dT}{dP} = \frac{T \Delta v}{\Delta h_f}$ Where:

• $\frac{dT}{dP}$ is the slope of the melting curve.
• $T$ is the absolute melting temperature.
• $\Delta v$ is the specific volume change upon melting ($v_{\text{liquid}} - v_{\text{solid}}$).
• $\Delta h_f$ is the specific enthalpy of fusion.

For water near 0°C, $\Delta v$ is negative, resulting in a negative $dT/dP$.

Other Properties of Water

Refer to the following properties of water at varying temperature and pressure conditions:

• Boiling points at high and vacuum pressure
• Density and specific weight
• Dynamic and kinematic viscosity
• Enthalpy and entropy
• Heat of vaporization
• Ionization Constant (pKw) of normal and heavy water
• Prandtl number
• Properties at Gas-Liquid Equilibrium Conditions
• Saturation pressure
• Specific gravity
• Specific heat (heat capacity)
• Specific volume
• Thermal conductivity
• Thermal diffusivity
• Vapour pressure at gas-liquid equilibrium

Interactive Charts

References

• Original Source