Question

1.A gas sample has a volume of 235 mLmL at 24 ∘C. What is its volume at 98 ∘C?

2.A sample of ideal gas is in a sealed container. The pressure of the gas is 475 torrr , and the temperature is 2 ∘C . If the temperature changes to 88 ∘C with no change in volume or amount of gas, what is the new pressure, P2, of the gas inside the container?

Express your answer with the appropriate units.

 

3.Using the same sample of gas (P1 = 475 torrtorr , T1 = 2 ∘C), we wish to change the pressure to 4750 torr with no accompanying change in volume or amount of gas. What temperature T2, in Celsius, is needed to reach this pressure?

Express your answer with the appropriate units.

 

4.A very flexible helium-filled balloon is released from the ground into the air at 20. ∘C. The initial volume of the balloon is 5.00 L, and the pressure is 760. mmHg. The balloon ascends to an altitude of 20 km, where the pressure is 76.0 mmHg and the temperature is −50. ∘C. What is the new volume, V2, of the balloon in liters, assuming it doesn't break or leak?

Express your answer with the appropriate units.

 

5.Consider 4.70 L of a gas at 365 mmHgmmHg and 20. ∘C . If the container is compressed to 2.80 L and the temperature is increased to 36 ∘C , what is the new pressure, P2, inside the container? Assume no change in the amount of gas inside the cylinder.

Express your answer with the appropriate units.

 

6.

As the temperature of a liquid is lowered, what happens to its vapor pressure?

As the temperature of a liquid is lowered, what happens to its vapor pressure?

Its vapor pressure is independent of temperature.

Its vapor pressure first rises then falls.

The vapor pressure may rise or drop depending on the liquid.

Its vapor pressure rises.

Its vapor pressure drops.