3. An ideal gas has a pressure of 3.00 atm , a volume of 4.50m’, and a temperature of 460K . а. How many moles of gas are there? b. How many gas molecules are there? What is the number density of gas molecules?

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Please explain and solve clearly. Write all answers to 3 significant figures and include proper units

3. An ideal gas has a pressure of
3.00 atm , a volume of 4.50m’, and a temperature of
460K .
а.
How many moles of gas are there?
b. How many gas molecules are there?
What is the number density of gas molecules?
Transcribed Image Text:3. An ideal gas has a pressure of 3.00 atm , a volume of 4.50m’, and a temperature of 460K . а. How many moles of gas are there? b. How many gas molecules are there? What is the number density of gas molecules?
Expert Solution
Step 1

Introduction:

Behavior of gas molecule is quite complicated. The clear description of the gas molecule given in kinetic theory of the gases. Ideal gas equation is the milestone in the history of the physics which helps to sort out several problems in the classical physics world. Ideal gas equation relates the pressure, volume, number of moles of gas, temperature in the single equation.

Given data:

Given the gas is an ideal gas.

Pressure of the gas is,

P=3.00 atm=303975 Pascal

Volume of the gas is,

V= 4.50 m3

Temperature of gas is,

T= 460 K

Formula used:

Ideal gas equation is,

PV= nRT

Where,

P- Pressure of gas in Pascal

V- Volume of gas in m3

n- No of moles of gas

T- Temperature of the gas

R- Gas constant=8.31 J/K.mole

Step 2

Calculation:

(a)

According ideal gas law,

PV= nRT303975 Pa4.50 m3= n8.31 J/K.mole460 Kn=303975 Pa4.50 m38.31 J/K.mole460 Kn=1367887.53822.6n=358 moles

(b)

1 mole of gas contain Avogadro's number of gas molecule

Avogadro's number= 6.02 x 1023 molecules/ moles

No of gas molecule (nmolecule) is,

nmolecule=357.84 moles6.02 x 1023 molecules/ molesnmolecule=2.15×1026molecule

(c)

Number density of gas molecule is,

No density= nmoleculeVNo density= 2.154×1026 molecules4.50 m3No density= 4.79×1025 molecules/ m3

 

 

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