1.

What is the pressure of 2 mole of NH_(3) at 27^(@)C when its volume is 5 litre in van der Waals equation ? (a=4.17, b=0.03711)

Answer»

<P>10.33 atm
9.33 atm
9.74 atm
9.2 atm

Solution :`(P+(an^(2))/(V))(V-nb)=NRT`
or `P=(nRT)/(V-nb)-(an^(2))/(V^(2))`
`=(2xx0.0821xx300)/(5-2xx0.03711)-(4.17xx2^(2))/(5^(2))`
`10-0.66=9.33" atm"`


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