∆H equation

[Maria Bajenov 1I]

For calculating ∆H, you solve for KJ(energy)/mol. The mol corresponds to n, but what constant corresponds to KJ?

[905022356]

If you are referring to the equation q= nCmΔT, the molar heat capacity of the substance will tell you how many joules are necessary to increase the temperature of one mol of the substance by 1 degree Celsius or Kelvin. By substituting each value into this equation, you will get a ΔH in joules per mol. To convert it to kJ per mol, you just have to divide that value by a thousand.

[Angel Gomez 1K]

Isn't the equation for finding change in heat as follows:
I know that the m accounts for mass instead of moles(which is usually represented as n), so would we simply switch out the m for n if we are presented with molar heat capacity?

[905022356]

There are two different equations. The first one, ΔH = mCΔT is found using the specific heat capacity of the substance, and m stands for the mass of the substance in grams. The second one, ΔH = nCΔT is found using the molar heat capacity of the substance, and n stands for the number of mol of the substance.