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3 moles of P and 2 moles of Q are mixed, what will be their total vapour pressure in the solution if their partial vapour pressures are 80 and 60 torr respectively?
  • a)
    80 torr
  • b)
    140 torr
  • c)
    72 torr
  • d)
    70 torr
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
3 moles of P and 2 moles of Q are mixed, what will be their total vapo...


Ptotal = pP + pQ = pPxP + pQxQ
= 80 x 0.6 + 60 x 0.4 = 72 torr.
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Most Upvoted Answer
3 moles of P and 2 moles of Q are mixed, what will be their total vapo...
Given:
Moles of P (n₁) = 3
Moles of Q (n₂) = 2
Partial vapour pressure of P (P₁) = 80 torr
Partial vapour pressure of Q (P₂) = 60 torr

To find: Total vapour pressure of the solution

The total vapour pressure of a solution is given by the sum of the partial pressures of its components.

Using Dalton's law of partial pressures, we can write:

Total vapour pressure (P_total) = P₁ + P₂

Calculation:
Substituting the given values into the equation, we get:

P_total = 80 torr + 60 torr
P_total = 140 torr

Therefore, the total vapour pressure of the solution is 140 torr.

Hence, the correct answer is option (b) 140 torr.
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3 moles of P and 2 moles of Q are mixed, what will be their total vapour pressure in the solution if their partial vapour pressures are 80 and 60 torr respectively?a)80 torrb)140 torrc)72 torrd)70 torrCorrect answer is option 'C'. Can you explain this answer?
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