아보가드로의 법칙. 10.0 g of argon gas + 10.0 g of neon gas

아보가드로의 법칙. 10.0 g of argon gas + 10.0 g of neon gas

 

 

At constant temperature, what will happen when 10.0 g of argon gas is added to a balloon containing 10.0 g of neon gas.

A) The balloon doubles in volume.

B) The volume of the balloon expands by more than 2 times.

C) The volume of the balloon expands by less than 2 times.

D) The balloon stays the same size, but the pressure increases.

E) none of these

 

 

A balloon contains 10.0 g of neon gas. With the temperature kept constant, 10.0 g of argon gas is added. What happens?

 

 

A balloon contains a certain mass of neon gas. The temperature is kept constant, and the same mass of argon gas is added to the balloon. What happens?

 

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Ne의 몰질량 = 20.18 g/mol 이므로,

10.0 g Ne의 몰수 = 10.0 g / (20.18 g/mol) = 0.496 mol Ne

( 참고 https://ywpop.tistory.com/7738 )

 

 

Ar의 몰질량 = 39.95 g/mol

10.0 / 39.95 = 0.250 mol Ar

 

 

 

From Avogadro’s Law,

V1 / n1 = V2 / n2

( 참고 https://ywpop.tistory.com/1979 )

 

V1 = 1 L 라고 가정하면,

1 L / 0.496 mol = V2 / (0.496 + 0.250 mol)

V2 = 1 / 0.496 × (0.496 + 0.250) = 1.50 L

 

 

 

부피는 1 L에서 1.50 L로 변했으므로,

답: C) The volume of the balloon expands by less than 2 times.