A gas sample w/ volume of 4.00 L has a pressure of 750 mm Hg and a temp of 77 degrees C.?

Question

What is the new volume at 277 degrees C?

Answer 1

i got the same answer as you!!!

here's what i did....

P= 750 mm Hg x 133 = 99750 Pa = 99.75 kPa

T1= 77 + 273.15 = 350.15

T2 = 277 + 273.15 = 550.15

R= 8.314 L.kPa/mol.K

PV = nRT1

n= (99.75 x 4)/ (8.314 x 350.15)

=399/2911

= 0.137 moles

V = nRT2/P

= 0.137 x 8.314 x 550.15/ 99.75

= 626.6/ 99.75

= 6.28 L

I've been mucking about with the significant figures as well but i don't come up with any of the options. If this were in an exam... i'd choose a.