Chemistry – Factors Affecting the Behavior of gases Essay Example

of gas molecules is increased. Thus, no. Of collisions of gas molecules per unit time per unit area is increased. Thus, pressure too increases. (Low temperature-low pressure , High temperature- high pressure) Variation of volume with temperature off fixed amount of gas at constant pressure Take 2 identical bottles and 2 same size balloons.

Set apparatus as shown. Keep one bottle in hot water, other in cold water. Volume of balloon fixed to bottle in hot water increases. Thus, volume increases as temperature increases.

Variation of pressure with volume off fixed amount of gas at constant temperature ACTIVITY: Close the hole at one end of a bicycle pump with a finger and push piston in. You will sense increasing pressure.

When volume of a fixed amount of gas at constant temperature is decreased, pressure increases. When volume is increased , pressure decreases. 0 Relationship between amount off gas and pressure under constant temperature and volume ACTIVITY: Blow air into deflated tube with a suitable pump and observe the hardness. Hardness is increased due to increase of pressure inside the tube.

ACTIVITY: Blow small amount of air into a balloon, touch and observe hardness.

Blow more air and feel again. Hardness increases due to pressure increase. Thus, pressure of gas at constant volume & temperature increases with the amount of gas. 0 Relationship between the amount of gas and the volume under constant pressure and temperature ACTIVITY: Blow air into a balloon with an air pump as shown.

Volume of air inside the pump gradually decreases & volume of air inside balloon gets increased. Thus, when the amount of air inside the balloon increases its volume too increases.