Q=mHr... What?!!

[TNB]

What do the variables the formula Q= mHr stand for?


And Q=mHv?
Mass Heat and volume?

[TheMasterMind]

i think you are referring to the energy formula Q=mH_v where

Q=energy
m=mass
Hv=heat of vaporation

[Russ]

Q would be in coulombs if I remember my high school chem.
Q = nF i think, where F is 96500

[Sodapop]

What do the variables the formula Q= mHr stand for?


And Q=mHv?
Mass Heat and volume?Q stands for heat, calculated in Joules.

Q=mCΔT

Q=heat
m=mass
C=given heat
ΔT=variation of temperature

(where heat equals mass x specific heat x variation of temperature).

This equation can be simply viewed as:
More energy is needed to increase the temperature of 5L of water than 1L of water.

The "v" in your equation simply means "vaporization", where we calculate the required energy to make a given substance to vaporize.
It could also be Q=mHf, instead of mHv, which would calculate the required energy to make a given substance to freeze. Adding an opposite sign to the "f" value would simply replace the freezing status by the melting status.