Q:

# What is the formula for heat of vaporization?

A:

The heat of vaporization formula is q = m x ?Hv, where "q" is heat energy, "m" is mass and "?Hv" is heat of vaporization. This represents the energy needed to heat a liquid into a gaseous state.

## Keep Learning

For example, the heat energy needed to turn 25 grams of water into steam (gaseous state) is: 25 grams x 2257 Joules/gram or 56425 Joules. The 2257 J/g is a predetermined value for heat of vaporization of water.

A practical application of the heat of vaporization is when a drop of methylated spirit put onto the hand evaporates. The hand feels cold because it provides the energy needed for the volatile liquid molecules to break free into gas.

Sources:

## Related Questions

• A: Kinetic energy is dependent on the object's mass and velocity. Since kinetic energy is the energy of motion, all objects that have motion have potential ki... Full Answer >
Filed Under:
• A: The formula for heat transfer, Q=Cm?t, provides the amount of heat transferred (Q) by plugging in the relevant numbers. "C" stands for the specific heat va... Full Answer >
Filed Under:
• A: The formula for calculating thermal conductivity is heat multiplied by the distance divided by the product of surface area times the temperature gradient. ... Full Answer >
Filed Under:
• A: The formula for specific latent heat is the amount of energy released or formed divided by the mass. The formula is notated as L = Q/m, where L is the late... Full Answer >
Filed Under:
PEOPLE SEARCH FOR