A bicycle tire is filled with air to a pressure of 610 kPa at a temperature of 19 oC. Riding the bike on asphalt on a hot day increases the temperature of the tire to 58 oC. The volume of the tire increases by 4.0%. What is the new pressure in the bicycle tire?

Answer 1

No volume is given; therefore, make up an easy one like 1 L.
Use PV = nRT and solve for n
Using n from the first calculation, use PV = nRT again using the new conditions and remember V is to be increased by 4%. Whatever value chose for V, the new V will be the old V plus 0.04 x old V.

Answer 2

21