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CHEM 1011

CHEM 1011. Experiment 11: Charles’ Law: the Volume-Temperature Relationship of a Gas. Objectives. To measure the volume of a fixed quantity of air as the temperature changes at constant pressure. To verify Charles’ Law. Introduction.

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CHEM 1011

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  1. CHEM 1011 Experiment 11: Charles’ Law: the Volume-Temperature Relationship of a Gas

  2. Objectives • To measure the volume of a fixed quantity of air as the temperature changes at constant pressure. • To verify Charles’ Law.

  3. Introduction • Charles’s Law states that when the pressure is held constant, the volume of a fixed mass of ideal gas is in direct proportion to the temperature in degrees Kelvin. • V = kT or k = V/T

  4. Introduction • For two sets of V and T: V1/T1 =V2/T2 or • V1T2=V2T1 or • (V1T2)/(V2T1)=1

  5. Chemicals and Equipment • Boiling stones • Bunsen burner(or hot plate) • 250mL Erlenmeyer flasks(2) • 800mL beakers(2) • Clamps • Glass tubing • Marking pencil

  6. Chemicals and Equipment(cont.) • One-hole rubber stopper • Ring stand • Ring support • Rubber tubing • Thermometer • Wire gauze

  7. Calculations • To determine T1, measure the temperature of the ice bath. • To determine T2, measure the temperature of the boiling water.

  8. Calculations • Vw is the volume of water sucked into Flask 1. • V2 is the volume of air at the temperature of boiling water which is determine from measuring the volume of Flask 1. • V1 is the volume of air at the temperature of the boiling water which is calculated from V1 = V2 - Vw

  9. Calculations • Charles’s Law can be determined from calculation V2T1/V1T2 • The percent deviation can be calculated by subtracting the number verifying Charles’s Law (8) from 1.00, dividing by 1.00, and multiplying by 100 % = 1.00-(8) x 100 100

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