Circle the one that has the indicated physical prosperity. lower critical temper

Question

Circle the one that has the indicated physical prosperity. lower critical temperature ammonia (NH_3) or methane (CH_4) greater; carbon tetrachloride (CCl_4) or carbon tetra bromide (CBr_4) lower viscosity glycol [c_1H_4(OH)_2] or ethanol [C_2H_3OH] greater dispersion forces propane (C_3H_3) or octane (C_8H_16 Stronger dipole-dipole forces: ethanol (C_2H_5OH) or diethyl ether (CH_3OCH_3) Of the substances C_2H_4. CH_2 OH. CH_3Cl. and H_2S. select the one that has the weakest dipole - dipole forces the most water solubility dispersion forces as its only intermolecular forces Calculate the amount of energy (in needed to heat 346 g of liquid water from 0 degree C to 182 degree C. Assume that the specific heat of water is 4.184 J/g degree C over the entire liquid range and that the specific heat of steam is 1.99 j/g degree C.

Explanation / Answer

9) a) critical temperatures

Ammonia = 132.4°c

Methane = -82.3°c

Methane has low critical temperature than ammonia

b) polarizability CCl4 >CBr4 strong C-Cl bond

c)ethanol has lower viscosity as it has less OH bonds

d) octane has greater dispersion force higher the molecular weight higher the dispersion forces

e)strong dipole dipole forces are in ethanol because of strong hydrogen bonding

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