dr. who asked in Science & MathematicsChemistry · 9 years ago

# What will be the new volume if 115 mL of He gas at 100°C and 0.979 atm is cooled to 24°C and the pressure is i?

What will be the new volume if 115 mL of He gas at 100°C and 0.979 atm is cooled to 24°C and the pressure is increased to 1.15 atm?

i dont get this at all!! i tried the P1=V1 method but i think im missing something...does anyone get it??

Relevance
• zvo
Lv 5
9 years ago

Approximately

P1.V1/T1 = P2.V2/T2 = constant (R)

you have numbers for 5 out of 6 variables. Have a think about whether temperature should be in centigrade, fahrenheit, kelvin or raymuir and make sure of the units and consistency of units for the rest.

• Anonymous
9 years ago

pv=rt only when the gas is ideal. You should not assume the gas is ideal unless the problem specifically states so. If you are in a general chemistry class they probably expect the ideal gas law but if the class is high level check out the bottom of this page under real gases. http://pages.towson.edu/ladon/gases.html