True or false: gas behaviour

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   At a fixed temperature, squeezing a gas into half the volume doubles its pressure.

2. Statement is true

   No

   Statement

   Charles's law works whether the temperature is written in celsius or in kelvin.

3. Statement is true

   Yes

   Statement

   Equal volumes of two gases at the same temperature and pressure hold the same number of molecules.

4. Statement is true

   No

   Statement

   Adding a second gas to a sealed flask changes the pressure the first gas exerts.

5. Statement is true

   Yes

   Statement

   For a gas collected over water, subtract the water vapour pressure to get the dry gas pressure.

6. Statement is true

   No

   Statement

   Real gases obey PV = nRT most closely when squeezed to very high pressure.

Instructions

Tap true or false for each statement.

Explanation