Chemistry Unit 2 Worksheet 3, Cheat Sheet of Chemistry

Download Chemistry Unit 2 Worksheet 3 and more Cheat Sheet Chemistry in PDF only on Docsity! Name Date Pd Unit 2 Worksheet 3 – PVTn Problems On each of the problems below, start with the given P, V, T, or n; then make a decision as to how a change in P, V, T, or n will affect the starting quantity, and then multiply by the appropriate factor. Draw particle diagrams of the initial and final conditions. 1. A sample of gas occupies 150 mL at 25 ˚C. What is its volume when the temperature is increased to 50˚C? (P and n = constant) 2. The pressure in a bicycle tire is 105 psi at 25˚C here in Fresno. You take the bicycle up to Huntington, where the temperature is – 5˚C. What is the pressure in the tire? (V and n = constant) 3. What would be the new pressure if 250 cm3 of gas at standard pressure is compressed to a volume of 150 cm3 ? ( T, n = constant) Modeling Chemistry 1 U2 ws 3 v2.1 P T V n Initial -- 298K 150mL -- Final -- 323K ? -- Effect --   -- P T V n Initial 105psi 298K -- -- Final ? 268K -- -- Effect   -- -- P T V n Initial 1atm -- 250cm3 -- Final ? -- 150cm3 -- Effect  --  -- 4. What would be the new volume if 250 cm3 of gas at 25˚C and 730 mm pressure were changed to standard conditions of temperature and pressure? (__n__= constant) 5. Sam’s bike tire contains 15 units of air particles and has a volume of 160mL. Under these conditions the pressure reads 13 psi. The tire develops a leak. Now it contains 10 units of air and has contracted to a volume of 150mL). What would the tire pressure be now? 6. A closed flask of air (0.250L) contains 5.0 “bobs” of particles. The pressure probe on the flask reads 93 kPa. A student uses a syringe to add an additional 3.0 “bobs” of air through the stopper. Find the new pressure inside the flask. 7. A 350 mL sample of gas has a temperature of 30˚C and a pressure of 1.20 atm. What temperature would needed for the same amount of gas to fit into a 250 mL flask at standard pressure? Modeling Chemistry 2 U2 ws 3 v2.1 P T V n Initial 730mmH g 298K 250cm3 -- Final 760mmH g 273K ? -- Effect     -- P T P T V n Initial 13psi -- 160mL 15u Final ? -- 150mL 10u Effect   --   V n P T V n Initial 93kP a -- -- 5bobs Final ? -- -- 8bobs Effect  -- --  P T V n Initial 1.2at m 303K 350mL -- Final 1atm ? 250mL -- Effect     -- P V