Question

Lol 0-15 Show complete solutions including formulas and express all answers to three sig figures. Don't forget units. 1. A tank with a volume of o.250 m3 is filled with an ideal gas at an abrsolute pressure of 1.01x105 Pa when the temperature is 20.0 C. a) Use the ideal gas law to calculate the number of moles of gas in the tank. b) The temperature of the gas is then raised to 6 C 2. The mass of one atom of oxygen is 1.33x10-20 kg, a) How many atoms are there in 21.0as temperature of 27 C? c) What is the rms speed (Vms) of these molecules at this temperature? 3. A styrofoam cup contains 0.100 kg of water at an initial temperature of 293 K. A 0.400 kg What is the new pressure in the tank at this higher temperature? of this gas? b) What is the volume occupied by the gas under a pressure of 1.32 x 10 Pa and a metal block at a temperature of 358 K is placed in the water. The final temperature of both zt equilibrium is 296 K. a) How much heat was lost by the metal? b) What is the specific heat capacity of the metal. 4. A house wall 2.0 m x 5.0 m, is constructed of 20.0 em thick concrete (k 1.50 J/ms C).a If the outside temperature on a cold day is 0.0 C and it is 20.0 °C on the inside, how much energy is conducted through the wall in 30.0 min? b) How much energy would be conducted in the same time if there was also pine wood facing 4.00 cm thick (k-0.150 J/ms C) on the inside? e T 20.0°C Inside T-20.0°C Outside T-0.0 °C Outside T-0.0 te Pine wood Concret a) b)

Answer 1

molecolae eed at 2 of oxygen a T= 300 K (27+273) K ее Rms Speed -