Hertzsprung-Russell (HR) Diagram Blue
white
White
Yellow
White
Orange Red Color
0
B
A
F
G
K
M
Spectral classification
10.000
Supergiants
100
Luminosity
Brightness
Main sequence stars
Sun
Guts
Compared
to the Sun
0.01
.
White dwars
0.0001
40,000
20,000 10,000
Temperature
5.000
2500
Examine the Hertzsprung-Russell diagram shown. Which category of stars has the greatest brightness?
Main sequence
Supergiants
Giants
White dwarfs

explanation:

answer : (a) volume of the gas = 8.67 ×   l

                (b) second virial coefficient b = -1.21226 l/mole

solution :   given,     t = 300k

                                p = 20atm

                                z = 0.86

                                n = 8.2 mmoles = 8.2 × moles

                                r =   0.082 l atm/k/mol

        find,     (a) volume of gas   and (b) second virial coefficient b at 300k.

formula used :            

                          and            

(a)            

                    = \times 0.082\times 300}{20}[/tex]

                    = 8.67 ×   l

(b)      

                    = (0.00867-1) × 8.659

                    = - 8.5839 l/mole

you need to stop taking that class