Answer to Question #289126 in General Chemistry for Unknown360305

Question

Answer the following worded problems below. Show your solutions.

A 17.3L of gas enclosed in a container having a standard pressure which is 760mmHg. If the pressure is lowered to 240mmHg, what will be the volume of the gas?

A 63L of HCl is heat-cured at 102.6 degrees Celsius, by adding another 63.44L of the same substance, the temperature lowers. What will be the temperature after adding the additional volume of HCl?

A series of changes in pressure in an oxygen tank, starting at 12kPa to 42kPa and to 56kPa. What will be the total pressure if the last state of oxygen inside the tank is thrice the initial pressure?

6L of water reached its boiling point at 46kPa. If the pressure increases at 99kPa and the volume lowers at 2.8L, what is the change in temperature?

Answer 1

1) P₁V₁ = P₂V₂ ; V₂ = P₁V₁ / P₂; V₂ = (17.3L ×  760mmHg) / 240mmHg = 54.7L

2) V₁T₂ = V₂T₁ ; T₂ = V₂T₁ / V₁; T₂ = (63.44L × 102.6°) / 63L = 103.3°

3) P_total = P₁ + P₂ + P₃ + P₄

P₄ = 3P₁ = 3 × 12kPa = 36kPa

P_total = 12kPa + 42kPa + 56kPa + 36kPa = 146kPa

4) PT/V = const

P₁T₁/V₁ = P₂T₂/V₂; (46/6)T₁ = (99/2.8)T₂; 7.6T₁ = 35.35T₂

ΔT = Т₂ / T₁ = 35.35 / 7.6 = 4.6 (K)