ΔE When Liquid Chlorine Changes Phase To Chlorine Gas At SBP

Strings (SiPjAjk) = S7P5A51     Base Sequence = 12735     String Sequence = 12735 - 5 - 51

Expressions Of Pj Problems
ΔE When Liquid Chlorine Changes Phase To Chlorine Gas At SBP
Math

What is ΔE (change in internal energy) when liquid chlorine changes phase to chlorine gas at standard boiling point, 284oK (vapor pressure 1 atm)? The enthalpy of vaporization of chlorine, Cl2, is 20.41 KJ/mole.

The strings:

S7P5A51 (Change - Physical Change)

The math:
Pj Problem of Interest is of type change (change in internal energy).

The equation of interest is:
enthalpy change (ΔH) = internal energy change (ΔE) + pressure-volume work (PΔV)

So, ΔH = ΔE + PΔV -------------(1)

So, ΔE = ΔH - PΔV ------------(2)

PΔV = nRT.
where, n is number of moles, R is universal gas constant = 8.315, T = temperature degrees K.
So, PΔV =1 x 8.315 x 284 = 2361.46 Joules/mole = 2.362KJ/mole.

ΔE = 20.41 - 2.362 = 18.05KJ/mole. The point . is a mathematical abstraction. It has negligible size and a great sense of position. Consequently, it is front and center in abstract existential reasoning.
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