Gases Exam3 and Problem Solutions

Gases Exam3 and  Problem Solutions

 

1. Find volume of 0,5mol CH4 under 3,28 atm pressure and 400 0K temperature.

Solution:

P=3,28 atm, n=0,5mol, T=400 0K, R=0,082, V=?

We use ideal gas law;

P.V=n.R.T

3,28.V=0,5.0,082.400

V=5 liters

 

2. If 6,4 g CH4 has pressure 0,5 atm and volume 2 liters, find pressure of 9 g C2H6 having 1 liter volume under constant temperature.(C=12, H=1)

Solution:

We first find mole of given matters;

nCH4=6,4/16=0,4mol

nC2H6=9/30=0,3mol

Since temperature is constant we write ideal gas law as given below;

gases exam4

 

 

 

(0,5.2)/0,4=(P2.1)/0,3

P2=0,75 atm

or P2= 57 cm Hg

 

3. Find density of O2 under 27 0C temperature and 1,23 atm pressure. (O=16)

Solution:

T=27 + 273=300 0K

If we write ideal gas law for density, we get following equation;

d=(P.M)/(R.T)

where M is molar mass of O2.

d=(1,23.32)/(0,082.300)

d=1,6g/liter

 

4. If we open the taps given in the picture below, find final temperature of gases.

 

gases exam5

 

 

 

 

 

 

Solution:

We use following equation to find final pressure of gas mixture;

P1.V1 + P2.V2 + P3.V3 = Pfinal.Vfinal

3.2 + 4.3 + 0.5 =Pfinal.(2+3+5)

6 + 12=Pfinal.10

Pfinal=1,8 atm

 

5. When we open the taps given in the picture below, find changes in the pressures of gases.

gases exam6

 

 

 

 

 

 

 

 

Solution:

We should find final pressure of system to make comparison.

P1.V1 + P2.V2 + P3.V3 = Pfinal.Vfinal

P.V + 2P.2V + 3P.V = Pfinal.(V+2V+V)

Pfinal=2P

Thus,

I. Pressure of first container increase

II. Pressure of second container stays constant

III. Pressure of third container decreases

 

Related

gases chemistry tutorials
exams in gases
ideal gas law exam questions and solutions
chemistry (P*V)/(T*n)=0,082
chemistry (P*V)/(T*n)=0,0082
gas law exams
final exam on gases and solutions
chemistry gas laws solutions and problems
tutorial questions and answers on atmospheric chemistry
PVnRT exam problems
gas laws exams and solutions
gas law with chemical reaction problems and solutions
gas laws problems and solutions
gas laws problem and solution
chem gas problems and solutions
final exam in chemistry/gas laws
calculating the pressure in a mixture of gas
atmospheric chemistry exam questions
gas+laws+exams+and+answers
Tutorial problems in atmospheric chemistry
pv=nrt d 0,0082
chemistry problems on gas laws/v t p
final gas law chemistry exam answers
gas law exam questions
ideal gas law exams and solutions
tutorials problems ideal solution
gas laws exams
p=2 atm, v=1L, n=5mol
chemistry problems d=pm/
gas laws vtp diagram
mixture of gases problem solutions
Exam+ATMOSPHERIC CHEMISTRY
atmospheric chemistry exams
gases answers
tutorial questions for real gas law
p=200 atm v=1l n=5mol t=?
"0,082" constant atm kelvin
when we open the taps given in the picture below, find changes in the pressure of gases
r gas constant 0,0082
atmospheric chemistry problems solutions
examples solutions "atmospheric chemistry"
final exams, problem and solutions of chemistry
atmospheric chemistry exam
gas law problems tutorial
gas law problems and answers
tutorial and answers on gases in chemistry
gas law exam
exam on gases
0,082 constant
atmospheric chemistry problem solutions