The drawing shows two thermally insulated tanks. They are connected by a valve t
ID: 2167534 • Letter: T
Question
The drawing shows two thermally insulated tanks. They are connected by a valve that is initially closed. Each tank contains neon gas at the pressure, temperature, and volume indicated in the drawing. When the valve is opened, the contents of the two tanks mix, and the pressure becomes constant throughout. (a) What is the final temperature? Ignore any change in temperature of the tanks themselves. (Hint: The heat gained by the gas in one tank is equal to that lost by the other.) (b) What is the final pressure?
(a) Number ? Units ?
(b) Number ? Units ?
Explanation / Answer
PV=nRT n=PV/RT n1=5.46*10^2 n2=2.4*10^2 n1+n2=n=786 P*7.8=786*8.314*T P/T=837.7 n1(T-220)=n2(580-T) 2.275T-500.5=580-T= =>T=330K P=2.76*10^5 Pa
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