Calculate the final pressure, in atmospheres, for each of the following, if volume and amount of gas do not change. |
You may want to reference (Pages 286 - 288) Section 8.4 while completing this problem. Part A A gas with an initial pressure of 1.26 atm at 65 ∘C is cooled to − 25 ∘C. Express the pressure to three significant figures and include the appropriate units.
SubmitRequest Answer Part B A sample of N2 with an initial pressure of 780. mmHg at − 81 ∘C is heated to 26 ∘C. Express the pressure to three significant figures and include the appropriate units.
SubmitRequest Answer |
A)
Given:
Pi = 1.26 atm
Ti = 65.0 oC
= (65.0+273) K
= 338 K
Tf = -25.0 oC
= (-25.0+273) K
= 248 K
use:
Pi/Ti = Pf/Tf
1.26 atm / 338.0 K = Pf / 248.0 K
Pf = 0.9245 atm
Answer: 0.924 atm
B)
Given:
Pi = 780 mmHg
Ti = -81.0 oC
= (-81.0+273) K
= 192 K
Tf = 26.0 oC
= (26.0+273) K
= 299 K
use:
Pi/Ti = Pf/Tf
780 mmHg / 192.0 K = Pf / 299.0 K
Pf = 1215 mmHg
= 1215/760 atm
= 1.60 atm
Answer: 1.60 atm
Calculate the final pressure, in atmospheres, for each of the following, if volume and amount of...
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