Chlorine gas reacts with fluorine gas to form chlorine trifluoride. Cl2( g )+3F2

Question

Chlorine gas reacts with fluorine gas to form chlorine trifluoride.
Cl2(g)+3F2(g)2ClF3(g)
A 1.90 L reaction vessel, initially at 298 K, contains chlorine gas at a partial pressure of 337 mmHg and fluorine gas at a partial pressure of 894 mmHg .

Part A

What is the pressure of ClF3 in the reaction vessel after the reaction?   

Express your answer to three significant figures.

Part B

What is the total pressure in the reaction vessel after the reaction?

Express your answer to three significant figures.

Explanation / Answer

Cl2 (g) + 3F2 (g) -------> 2ClF3 (g)
337 894 0

A)
1 mol of Cl2 reacts with 3 mol of F2
so, 337 mm of Cl2 will react with 337*3 = 1011 mm of F2
So, F2 is limiting reagent

whole of F2 will react
P of ClF3 formed = (2/3)*894 = 596 mm Hg

Answer: 596 mm Hg

B)
P of Cl2 reacted = 894/3 = 298 mm Hg
P of CL2 remaining = 337 - 298 = 39 mm Hg

total pressure = 39 + 596 = 635 mm Hg
Answer: 635 mm Hg

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