Model 4: Ideal Gas Law modified to solve a 2-condition type problem 5. A helium weather balloon resting near the ground at a pressure of 754 mm Hg...

Model 4: Ideal Gas Law modified to solve a 2-condition type problem 5. A helium weather balloon resting near the ground at a pressure of 754 mm Hg and a temperature of 22.5oC, has a volume of 4.19 x 103 L. What will be the new volume at a height 20 miles from the Earths surface where the temperature is -33.0oC and the pressure is 76.0 mm Hg? Exercises Key Questions Simplify equation 1. to solve the following problem: 4. An automobile tire is filled with air at a pressure of 30. lb/in2 at 18C. The temperature drops to 0C. What is the new tire pressure in lb/in2, assuming the volume of the tire does not change? Hint: Pressure can be calculated in units of lb/in2 but temperature must be changed to the Kelvin scale (ans: = 28 lb/in2) 6. When comparing two gases at fixed temperature and pressure, what is the only factor that will decide which gas has a greater density. Explain why this makes sense.