Charles' Law

On a hot day, party balloon is filled with helium. The following day is much colder, but the ai pressure is the same. Assuming that no helium escapes from the balloon in that time, what will happen to the volume of the balloon compared to the other day?

• A. It will increase in volume.

• B. It will decrease in volume.

• C. It will increase then decrease.

• D. It will not change.

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NGSS.HS-PS3-4

A gas initially has volume of 0.8 L and is at a temperature of 20°C. The gas is heated at constant pressure until its temperature is 70°C. what is the volume of the gas after it is heated?

• A. 0.7 L

• B. 0.8 L

• C. 0.9 L

• D. 1.0 L

Under conditions of fixed pressure and amount of gas, Charles' law requires that

I. V₁T₁ =V₂T₂

II. V/T=constant

III. V₁T₂=V₂T₁

• A. I only

• B. I and II only

• C. II and III only

• D. I, II, and III

The constant quantity of Charles' Law is

• A. Only mass of the gas

• B. Only temperature of a gas

• C. Amount and Pressure of a gas

• D. Amount and temperatue of a gas

A gas is cooled while being kept at a constant pressure. If its temperature in Kelvin changes by a factor of 0.25, by factor does the volume of the gas change?

• A. 0.25

• B. 0.50

• C. 0.75

• D. 1.0