One hundred moles of hydrogen gas at 298 k are reversibly and isothermally compressed from 30 to 10 liters. the van der waals constants for hydrogen are a = 0.2461 liters2 · atm· mole– 2 and b = 0.02668 liters/mole, and in the range of pressure 0– 1500 atm, the virial equation for hydrogen is pv = rt (1 + 6.4 × 10– 4 p ). calculate the work that must be done on the system to effect the required change in volume and compare this with the values that would be calculated assuming that
(a) hydrogen behaves as a van der waals fluid and
(b) hydrogen behaves as an ideal gas.

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.

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