CHEMISTRY · Multi-part · A Level · Chemistry · Amount of substance · Amount of substance
Problem
Two identical, rigid containers (Containers X and Y) are held at the same temperature. Each contains only helium gas (He) and neon gas (Ne). The total pressure in both containers is 1.20 atm.
• Container X contains equal numbers of moles of He and Ne.
• In Container Y the partial pressure of He is 0.90 atm.
(a) Which container has the greater mole fraction of Ne? Justify your answer without numerical calculation.
(b) Rank the partial pressures of He in the two containers from greatest to least. Explain your reasoning.
(c) Discuss whether the partial pressure of He in a container depends on the chemical identity of the other gas present, assuming ideal behavior. Support your answer with particulate-level reasoning.