The enthalpy of vaporization of Substance X is 23.0Round your answer to 2 significant digits.0atmx10×kJand its normal boiling point is 10. °C. Calculate the vapor pressure of X at - 18. °C.molŚ

The enthalpy of vaporization, of substance X is given as .The relationship between kJ and J is…

Answered: The enthalpy of vaporization of…

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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The enthalpy of vaporization of Substance X is 23.0
Round your answer to 2 significant digits.
0
atm
x10
×
kJ
and its normal boiling point is 10. °C. Calculate the vapor pressure of X at - 18. °C.
mol
Ś

Expert Solution

Step 1: Given information:

The enthalpy of vaporization, $increment H subscript v a p end subscript$ of substance X is given as $23.0 space k J divided by m o l$ .

The relationship between kJ and J is given by an expression as follows:

$1 space k J space equals space 1000 space J$

Converting $increment H subscript v a p end subscript$ in J/mol.

$increment H subscript v a p end subscript space left parenthesis i n space J divided by m o l right parenthesis space equals space fraction numerator 1000 space J over denominator 1 space k J end fraction space cross times space 23.0 space k J divided by m o l space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 23.0 space cross times space 10 cubed space J divided by m o l$

The normal boiling point of the substance X is given as $10 to the power of space o end exponent C$ .

The temperature at which the vapor pressure of a liquid becomes equal to the atmospheric pressure is called the normal boiling point of that liquid.

We have to determine the vapor pressure of the substance X at $negative 18 to the power of space o end exponent C$ .

The relationship between the temperature in degrees Celsius and the temperature in Kelvin is given by an expression as follows:

$T space left parenthesis K right parenthesis space equals space t to the power of space o end exponent C space plus space 273.15$

Converting $10 to the power of space o end exponent C$ in Kelvin.

$10 to the power of space o end exponent C space left parenthesis i n space K e l v i n right parenthesis space equals space 10 to the power of space o end exponent C space plus space 273.15 space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 283.15 space K$

Converting $negative 18 to the power of space o end exponent C$ in Kelvin.

$negative 18 to the power of space o end exponent C space left parenthesis i n space K e l v i n right parenthesis space equals space minus 18 to the power of space o end exponent C space plus space 273.15 space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 255.15 space K space space space space space space space space space space space$

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