Chemistry
posted by Shoaib .
A car tyre has a volume of 10 L when inflated. The tyre is inflated to a pressure of 3 atm at 17°C with air. Due to driving, the temperature of the tyre increases to 47°C.
a) what would be the pressure at this temperature?
b) how many litres of air measured at 47°C and pressure of 1 atm should be let out to restore the tyre to 3 atm at 47°C?

a.
(P1/T1) = (P2/T2)
b.
(P1V1/T1)= (P2V2/T2) 
I still am confused about the part B of the question. plz explain

I am too, but try this.
PV = nRT and plug in 3.31 atm, 10L, 320 K, and calculate n. That will be the number of moles at 290K as well as at 320 K. Then redo PV = nRT using 320K, 3 atm, then subtract moles at 3.31 atm from moles at 3 atm. That will be the moles that must be released. Then PV = nRT and plug in the new conditions for air to ber released. If I didn't goof the volume to be released is about 3 L *(@ 47 C and 1 atm P). 
Yea it works. we get 3.1 litre. thanks a lot..
Respond to this Question
Similar Questions

Physics QUIZ
Rising air cools as a result of a decrease in barometric pressure with altitude. (Lapse Rate) True/False? 
physics
nitrigen gas is used to inflate the tyres of Lewis Hamilton's racing car if the tyre is inflated to a pressure of 2,2 atm at 25 degrees celcius and he takes the car for a lap it heat up to 50 degrees celcius what is the pressure at … 
science
A 1,200kg car has its tyres inflated to a gauge pressure of 180kPa.How large an area for each tyre is in contact with the ground? 
chemistry
In terms of kinetic theory explain why tyre should not be over inflated 
MATHS A
A tyre manufacturer has chosen 48 tyres at random from a production line and issued them to taxis for testing. Assume that the 48 numbers you have selected refer to the number of thousands of kilometres travelled during the life of … 
Maths A
A tyre manufacturer has chosen 48 tyres at random from a production line and issued them to taxis for testing. Assume that the 48 numbers you have selected refer to the number of thousands of kilometres travelled during the life of … 
Maths
A tyre manufacturer has chosen 48 tyres at random from a production line and issued them to taxis for testing. Assume that the 48 numbers you have selected refer to the number of thousands of kilometres travelled during the life of … 
Maths
A tyre manufacturer has chosen 48 tyres at random from a production line and issued them to taxis for testing. Assume that the 48 numbers you have selected refer to the number of thousands of kilometres travelled during the life of … 
Physics
At the start of a road trip, the pressure of the air in a car tyre is 276kPa and the temperature is 12.0 degrees celsius. After driving for some time the pressure in the tyre is now 303kPa. Assuming that the volume of the air inside … 
physics
A small tiny nail may Pierce an inflated Tyre and remain there without pressure reduction.explain