Thermal Questions

In a constant-volume gas thermometer, the -1 pressure is 0.019 atm at 100 degrees Celsius. Find .the temperature when the pressure is 0.027 atm

Using  we will find that Tf = (373*0.027)/0.019 = 530 K C=530 – 273 = 257 ((Hint: Change the unit of the temperature from degrees to Kelvin)) .Ans. 257 degrees Celsius

4- Fahrenheit and Kelvin scales agree at a reading of: Tf = Tk  (9/5)Tc + 32 = Tc + 273  273 – 32 = (9/5)Tc – Tc = (4/5)Tc  Tc = (5/4)*241 = 301.25 Then change it to Kelvin by adding 273  T = 301 + 273 = 574 K Ans. 574 K.

6- One mole of an ideal gas has a temperature of 25 degree Celsius. If the volume is held constant and the pressure is doubled, the final temperature will be:

Using  where Pf = 2Pi  Tf = 2 * (25) = 500 Tf = 50 + 273 = 323 K Ans. 323 K.

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