Question

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. Figure of 0

Part A Part complete 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. -- SubmitPrevious AnswersRequest Answer Incorrect; Try Again; 2 attempts remaining Part B Part complete 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 T = SubmitPrevious AnswersRequest Answer T T = Value Units

Answer 1

A)
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
= (1737 - 273) oC
= 1464 oC
Answer: 1.5*10^2

B)
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
= (252 - 273) oC
= -21 oC
Answer: -21