Would the following increase or decrease in volume....?

Question

1. pressure decreases as you're surfacing up to the water, would the air bubbles increase or decrease?

2. baking bread: as the temp increases, would the volume increase or decrease?

3. If you take a balloon outside on a cold day, will the volume of it increase or decrease?

Answer 1

The ideal gas law is PV=nRT

or Pressure (kPa) * Volume (L) = moles * a constant R = 8.3 * temperature (in K = C + 273.14)



1) when an air bubble rises to the surface the pressure is reduced so the volume INCREASES as the moles is constant and we assume the temp stays the same.



2) with baking, the pressure and moles are constant so when temperature increases, the volume INCREASES



3) Balloon on a cold day - pressure and moles of air in the ballon are constant so as temperature decreases, the volume in the balloon must also DECREASE.

Answer 2

1. Boyle's Law - Volume is Inversely Proportional to Temperature (i.e. if one increases the other decreases). If the pressure is decreasing, the volume of the air bubbles would increase. INCREASE.



2. Volume and temperature are directly proportional (i.e. if one increases so does the other). If you increase the temperature, the volume increases. INCREASE.



3. Same as number 2. You decrease the temperature this time though. DECREASE

Answer 3

1. Increase

2. Increase

3. Decrease

Answer 4

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