I just need the answer for #4 and #5 please PRELABORATORY EXERCISES Name The Gas

Question

I just need the answer for #4 and #5 please

PRELABORATORY EXERCISES Name The Gas Laws 1. List the three factors that determine the volume of a gas: (c) unber of moles ressure When dealing with gases it is common to refer to volumes at standard temperature and pressure. What are the values of standard temperature and pressure as applied to gases? 2. standard T27 standard P = 3. Correctly state the following gas laws: (a) Boyle's Law: r a iel amount of an idea 3as lheP ed a, Sieel team feraturel Pressure, and volume ¢re nversely (b) Charles' Law, when the nesswe e-Y Samy e-or d dry ga Suppose you collected some oxygen gas that is saturated with water vapor and the total pressure of 02 plus water vapor equaled 750.5 torr at 25°C. What is the pressure exerted by only the oxygen gas? The vapor pressure of water at 25°C can be found in Appendix A-12 4. pressure O2- You have a balloon filled with air. It has a volume of 5.20 gallons at 28.5°C and 745 torr. What would be the volume of the balloon, in gallons, at-25.0°C and 250 torr? 5, volume =

Explanation / Answer

(1) We know that gas law is PV = nRT

Where P - Pressure , V- Volume , n - number of moles , R - gas constant , T - Temperature

So inorder to calculate volume we require (1) Pressure (2) Temperature (3) Number of moles

(2) STP is known as standard temperature and pressure.

So the standard temperature is 273 K & standard pressure is 1 atm

(3) Boyle's law : For a fixed amount of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional.

PV = constant

Charles's law: For a fixed mass of gas at constant pressure, the volume is directly proportional to the kelvin temperature.

V = constant * T

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