CHMA10H3 Lecture Notes - Lecture 2: Hot Air Balloon, Molar Mass, Stoichiometry
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CHMA10H3 Full Course Notes
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Gas pressure: the force per unit area exerted by gas molecules colliding with the surfaces around them. Pressure depends on: number of gas particles in a given volume (less parictles=lower pressure) Millimetre of mercury (mmhg) > how pressure is measured with a barometer; also called a. Barometer: when the atmospheric pressure rises, the height of the mercury column rises and when the pressure falls the height falls. Bar unit of pressure= 100 000 pa. Manometer: pressure pressure of a gas sample, u-shaped tube containing a dense liquid, usually mercury. Height difference indicates pressure of gas relative to atmospheric pressure. 5. 3 the gas la(cid:449)s: boyle"s la(cid:449), charle"s la(cid:449) and a(cid:448)ogado"s la(cid:449) Inverse relationship between volume and pressure- an increase in one results in a decrease in the other (as pressure increases volume decreases) Volume and temperature has a direct relationship. V is directly proportional to t (constant p and n)