General Chemistry
General Chemistry
4th Edition
ISBN: 9781891389603
Author: Donald A. McQuarrie, Peter A. Rock, Ethan B. Gallogly
Publisher: University Science Books
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Chapter 15, Problem 15.6P
Interpretation Introduction

Interpretation:

The heat energy required to vaporize 100μg of einsteinium has to be determined.

Concept Introduction:

Molar enthalpy for a process is the quantity of heat energy needed by one mole of a substance to undergo change in the process. The heat energy absorbed by n mole of substance to undergo phase change is as follows:

  q=n(ΔH)

Here,

q is the heat energy in kJ

n is the number of moles of substance.

ΔH is the enthalpy for process in kJ/mol .

The value of ΔH is positive always as energy is needed to overcome the interactions between the liquid molecules.

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