A balloon has a volume of 1000cc at room temperature (27oC). I leave it in my parked car, which the sun heats up to 42oC. What is its new volume?

Answer
A) 950 cc.
B) 1000 cc.
C) 1050 cc.
D) 1500 cc.

To find the new volume of the balloon, we can use Charles's Law, which states that the volume of a gas is directly proportional to its temperature, assuming pressure remains constant.

To apply Charles's Law, we'll need to convert the temperatures from Celsius to Kelvin. Kelvin is the absolute temperature scale and is used in gas laws equations.

To convert Celsius to Kelvin, we add 273.15 to the Celsius temperature.

Room temperature: 27°C + 273.15 = 300.15 K
Car temperature: 42°C + 273.15 = 315.15 K

According to Charles's Law,

(V1 / T1) = (V2 / T2),

where:
V1 = initial volume of the balloon
T1 = initial temperature in Kelvin
V2 = final volume of the balloon (what we're looking for)
T2 = final temperature in Kelvin

Plugging in our values, we have:

(1000 cc / 300.15 K) = (V2 / 315.15 K).

To find V2 (the final volume), we can rearrange the equation:

V2 = (1000 cc / 300.15 K) * 315.15 K.

Calculating this, we get:

V2 ≈ 1049.92 cc.

Rounding to the nearest whole number, the new volume of the balloon is approximately 1050 cc.

Therefore, the answer is C) 1050 cc.