Agas obeys the following equation of state: 1) p (v-b) rt+(ap2/t) where p is the pressure, v is the specific volume, t is the temperature, r is the universal gas constant, and a and b are constants for a gas. v (a) [17 points] calculate the entropy change involved when the gas changes from 4 atm and 300 k to 12 atm and 400 k. (b) [8 points] estimate the mean specific heat (cp) at 12 atm. mean specific heat (cp) at 1 atm 8 cal/g value of constant a 1 liter. k/atm. mol value of constant b = 0.08 liter/mol data:

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

10 years is the answer

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