Question

Review I Constants I Periodic Table A 128 mL bubble of hot gases at 213 ° C and 1.82 atm is emitted from an active volcano. Part A What is the final temperature, in degrees Celsius, of the gas in the bubble outsine tha voano if the final volume of the bubble is 135 mL and the pressure is 0.850 atm, if the amount of gas does not change? Express your answer using two significant figures.

Answer 1

Given:

Pi = 1.82 atm

Pf = 0.850 atm

Vi = 128 mL

Vf = 135 mL

Ti = 213.0 oC

= (213.0+273) K

= 486 K

use:

(Pi*Vi)/(Ti) = (Pf*Vf)/(Tf)

(1.82 atm*128 mL)/(486.0 K) = (0.85 atm*135 mL)/(Tf)

Tf = 239 K

= (239 - 273) oC

= -34 oC

Answer: -34 oC