Real gases are modeled by the van der waals equation by considering interatomic attractions and molecular volume as follows where t is the absolute temperature, p is the pressure, vm is the molar volume, r is the gas constant, and a and b are constants specific to each gas. in contrast, the ideal gas equation pv-rt models gas particles as point masses and does not account for interatomic attractions. a) use mathematica to implement the ideal and van der waals equations of state as two-variable functions p(t, vm) for nitrogen gas (a -1.37012. bar. mol2 b 3.87 x102l. mol; r-8.314 x10-2l. bar. k-1.mol) b) use your p(t, vm) functions to generate two plots of pvs. vn in the molar volume range of o.05 l. mol-1 to 1.0l. mol and pressure range of o to 200 bar, at t127 k and t 300 k. add a title to each plot indicating the temperature value. label both axes (including units). include a legend indicating which curve corresponds to which equation of state. each curve must be rendered in a different color.

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

its first and third is your answer i did the qustion the fourth isnt right

the correct answer is:

a. formation of precipitation