You have just celebrated your birthday at McDonald’s. As a gift, your chemistry

Question

You have just celebrated your birthday at McDonald’s. As a gift, your chemistry teacher has given you a Helium balloon. The temperature inside the McDonald’s was 22.3°C and the volume of the balloon was 1.11 liters. Unfortunately, you left your balloon in your car overnight and when you looked at it in the morning, its volume was 1 liters. What was the temperature (in units of oC) in your car in the morning? Look at your equations and assume there was no change in the pressure between the restaurant and the car.

Explanation / Answer

When pressure is constant then Volume is directly proportional to Temperature.

V1/T1 = V2/T2

1.11/(22.3+273) = 1/T2

T2= temperature in car = 266.036 K

T2 = (266.036 - 273) = -6.964 degree C

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