Answer to Question #168042 in General Chemistry for En Hui Peng

Question #168042

Hydrogen initially occupies 164 liters. If it changes to a volume of 73 L at 0° C and 760 mm Hg. If the initial temperature of the hydrogen was 28° C, what was its initial pressure of the gas in mm Hg? Round to two decimal places.


1
Expert's answer
2021-03-05T03:27:35-0500

0oC = 273.15 K

28oC = 301.15 K

According to the combined gas law,

"\\frac{p_1V_1}{T_1}=\\frac{p_2V_2}{T_2}"

Therefore,

"p_1=\\frac{T_1p_2V_2}{V_1T_2}=\\frac{301.15K\\times760mmHg\\times73L}{164L\\times273.15K}=372.97mmHg" (to 2 decimal places)


Answer: 372.97 mmHg


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