Chemistry - Ideal Gas Question with Solution | TestHub
In each case of Column I the vessel is a rigid 12.3 L vessel brought back to 300 K after any reaction is complete (/ = 2 atm per mole of gas; volume of liquid water is ignored). Match each mixture with the statements in Column II that are true for the final state (a Column I entry may match more than one Column II entry):
Column I (Mixture) | Column II (Final state) |
|---|---|
() 4 g and 16 g , sparked | (1) total moles of gas decrease |
(Q) 28 g and 6 g , reacted completely to | (2) only one gas is present at the end |
() 28 g and 32 g , sparked | (3) final pressure = 2 atm |
(S) 4 g and 20 g , no reaction | (4) final pressure = 4 atm |
| (5) final pressure = 3 atm |
Choose the option with the correct matching:
Options:
Answer:
Solution:
Pressure = (moles of gas) x 2 atm.
() = 2 mol, = 0.5 mol. + gives liquid water using 1 mol and 0.5 mol . Left: 1 mol (moles fall from 2.5 to 1, one gas, 2 atm): 1, 2, 3.
(Q) = 1 mol, = 3 mol gives 2 mol (moles fall from 4 to 2, one gas, 4 atm): 1, 2, 4.
() = 1 mol, = 1 mol. 2CO + gives 1 mol using 0.5 mol . Left: 0.5 mol + 1 mol = 1.5 mol (fall from 2, two gases, 3 atm): 1, 5.
(S) = 1 mol, = 1 mol, no reaction: moles unchanged, 2 mol, 4 atm: 4.
Correct matching: to 1,2,3; Q to 1,2,4; to 1,5; S to 4. Answer: (D).
