Calculate the final temperature, in degrees Celsius, ∘C, for each of the following, if V and n do not change:
You may want to reference (Pages 286 - 288) Section 8.4 while completing this problem.
1.
A sample of helium gas with a pressure of 330 torr at 0 ∘C is heated to give a pressure of 2100 torr.
Express your answer to two significant figures and include the appropriate units
t=
2.
A sample of air at 13 ∘C and 750. mmHg is cooled to give a pressure of 660. mmHg.
Express your answer as integer and include the appropriate units.
t=
1)
Given:
Ti = 0.0 oC
= (0.0+273) K
= 273 K
Pi = 330 torr
Pf = 2100 torr
use:
Pi/Ti = Pf/Tf
330.0 torr / 273.0 K = 2100.0 torr / Tf
Tf = 1737 K
Answer: 1.7*10^3 K
2)
Given:
Ti = 13.0 oC
= (13.0+273) K
= 286 K
Pi = 750 mmHg
Pf = 660 mmHg
use:
Pi/Ti = Pf/Tf
750.0 mmHg / 286.0 K = 660.0 mmHg / Tf
Tf = 252 K
Answer: 252 K
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