Home > Chemistry > Enthalpy

What symbol is used to represent enthalpy?

Answer 1

Jeremiah Adams

Chemists use the symbol #H# to represent enthalpy.

In 1922, Alfred W. Porter proposed that #H# become the accepted symbol for enthalpy.

Greek en = "into" + thalpein = "to heat" is where the word "enthalpy" originates.

We cannot measure the total enthalpy, #H#, of a system directly.

Therefore, we measure the change in enthalpy, #ΔH#.

In terms of symbols,

#ΔH = ΔU + pΔV#

where

#ΔU" =# thechange in internal energy; #p# = the external pressure, and #ΔV# = the change in volume of the system.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Ellie Andrews

The symbol used to represent enthalpy is (H).

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.