Question

We following relationships between pressure, volume, and temperature. You can use your book or you can look at our website in the class schedule for this week. As Pressure increases, volume As temperature increases, volume As temperature increases, pressure As the number of moles of gas increases, volume 6. What is Dalton's Law of Partial Pressures? 7. When solid potassium chlorate decomposes, potassium chloride (s) and oxygen gas form. How many liters of oxygen are formed at STP when 8.4g of potassium chlorate decompose? b. How many grams of potassium chloride also form when 11.5L of oxygen gas are collected at STP? 167

Answer 1

Boyle's law At constant temperature, the volume of a sample of a gas varies inversely with the pressure. Va 1/P V = K/P PV = K PV = Constant Mathematically, it can be written as P.V1 = P2 V2 P1/P2 = V2/V At pressure increases volume decreases According to Charle's law, at constant pressure, the volume of the given mass of gas, is directly proportional to its absolute temperature. i.e. VaT, V/T = constant, V/T, = V/T2 At temperature increases volume increases According to Gaylussac law, at constant volume, the pressure of the gas is directly proportional to its absolute temperature. i.e. Pat therefore P/T = (K) constant, P/T = P2/T2 At temperature increases Pressure increases According to avogadro's law, at constant temperature and pressure, the volume of the gas is proportional to the number of moles of gas present. i.e. Van, where n= number of moles Number of moles of gas increases Volume increases

6. Dalton's law of partial pressures: According to Dalton's law of partial pressures, the total pressure of mixture of gases is equal to the sum of the partial pressures of component gases present in the mixture. if in mixture gas 1, gas 2, gas 3 is present, their partial pressures are gas 1 partial pressure P1, gas 2 partial pressure P2, gas 3 partial pressure P3, then Protal is Protal = P1 + P2 + P3 Partial pressure of gas = total pressure of mixture (mole fraction of gas) For example P; = X x Ptotal