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Physical Chemistry
The enthalpy of hydrogenation of cyclohexene is -119.5 KJ/mol.If Resonance energy of benzene is -150.4 KJ/mol,its enthalpy of hydrogenation would be
options are-
(a) -358.5 KJ/mol
(b) -508.9 KJ/mol
(c) -208.1 KJ/mol
(d) -269.9 KJ/mol
options are-
(a) -358.5 KJ/mol
(b) -508.9 KJ/mol
(c) -208.1 KJ/mol
(d) -269.9 KJ/mol
Physical Chemistry
what are degenerate energy levels
Physical Chemistry
Ques no. 14 ,15 ,16 &17 on
http://i66.tinypic.com/yec8j.jpg
http://i66.tinypic.com/yec8j.jpg
Physical Chemistry
the ratio of numbers of mole of kmno4 and k2cr2o7 required to oxidised 0.1 mole sn2+ and sn4+ in acidic medium .
Physical Chemistry
What is a compound?
Physical Chemistry
In an experiment to determine the enthalpy change (△H) for the neutralisation reaction
NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)
100 mL (VHCl) of a 0.5 M (CHCl) HCl solution are reacted with 100 mL (VNaOH) of a 0.5 M (CNaOH) NaOH solution. The initial temperature of the system (Ti) is 20.1°C, whereas the final temperature (Tf) is 23.4°C. Assume that the density (p) of both 0.5 M HCl and 0.5 M NaOH solutions is 1.0 g mL-1, and that the specific heat capacity (Cp) is 4.183 J g-1 K-1.
a) Calculate the amount of heat in J (i.e. the enthalpy change △H) involved in the reaction, stating whether it is endothermic or exothermic.
b) Calculate the molar enthalpy in kJ mol-1 (Hm) for the reaction.
NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)
100 mL (VHCl) of a 0.5 M (CHCl) HCl solution are reacted with 100 mL (VNaOH) of a 0.5 M (CNaOH) NaOH solution. The initial temperature of the system (Ti) is 20.1°C, whereas the final temperature (Tf) is 23.4°C. Assume that the density (p) of both 0.5 M HCl and 0.5 M NaOH solutions is 1.0 g mL-1, and that the specific heat capacity (Cp) is 4.183 J g-1 K-1.
a) Calculate the amount of heat in J (i.e. the enthalpy change △H) involved in the reaction, stating whether it is endothermic or exothermic.
b) Calculate the molar enthalpy in kJ mol-1 (Hm) for the reaction.
Physical Chemistry
in 1 lit saturated solution of AgCl [Ksp(AgCl)=1.6*10^-10], 0.1 M of CuCl [Ksp(CuCl)=1.0*10^-6 is added.the resultant concentration of Ag+ in the solution is 1.6*10^-x. the value of 'x" is
Physical Chemistry
500 ml of 0.2 M aqueous solution of acetic acid is mixed with 500ml of 0.2 M HCl at 25 degree celcius
i) calculate the degree of dissociation of acetic acid in the resulting solution and pH of the solution
ii)if 6gm NaOH is added to the above solution determine the final pH(there is no change in volume on mixing)Ka of acetic acid is 1.75*10^-5mol L-1
i) calculate the degree of dissociation of acetic acid in the resulting solution and pH of the solution
ii)if 6gm NaOH is added to the above solution determine the final pH(there is no change in volume on mixing)Ka of acetic acid is 1.75*10^-5mol L-1
Physical Chemistry
0.1M NaOH is titrated with 0.1M HA till the end point,Ka for HA is 5.6*10^-6 and degree of hydrolysis is less compared to 1.calculate the pH of the resulting solution at the end point.
Physical Chemistry
2.5 ml of 2/5M weak monoacidic base (Ka=1*10^-12 at 25 degree celcius) is titrated with 2/15MHCl in water at 25 degree celcius.the concentration of H+ at equivalent point is (Kw=1*10^-14 at 25 degree celcius)
