2. (а) A helium gas (He) leak resulted in a rectangular vessel (200 cm x 20 cm x 10 cm) becoming pressurized at a temperature of 20 °C with 400 g of helium. Given that the van der Waals constants for helium (He) are: a (L? atm mol?) = 0.0341

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2.
(a)
A helium gas (He) leak resulted in a rectangular vessel (200 cm x 20 cm x 10 cm) becoming
pressurized at a temperature of 20 °C with 400 g of helium.
Given that the van der Waals constants for helium (He) are:
a (L² atm mol?) = 0.0341
b (L mol') = 0.02370
(i) Calculate the pressure exerted by the helium gas in the vessel.
(ii) Calculate the root mean square speed of a He atom at 20 °C.
Transcribed Image Text:2. (a) A helium gas (He) leak resulted in a rectangular vessel (200 cm x 20 cm x 10 cm) becoming pressurized at a temperature of 20 °C with 400 g of helium. Given that the van der Waals constants for helium (He) are: a (L² atm mol?) = 0.0341 b (L mol') = 0.02370 (i) Calculate the pressure exerted by the helium gas in the vessel. (ii) Calculate the root mean square speed of a He atom at 20 °C.
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