Answered: An unknown substance X (ΔHvap = 22.1…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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An unknown substance X (ΔHvap = 22.1 kJ/mol) has a vapor pressure of 76.0 mmHg at 300 K. Determine the substances normal boiling temperature. Group of answer choices 390. K 405. K 301 K 553 K

Expert Solution

Step 1) Given that

Given that, unknown substance x

ΔHvap = 22.1 kJ/mol

Vapour pressure = P₁ = 76 mmHg

Temperature = T₁ = 300 K

Normal boiling point is always taken at 1 atm pressure.

1 atm = 760 mmHg

At normal boiling point

Vapour pressure = P₂ = 760 mmHg

Boiling temperature = T₂ = ? K

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