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A conductivity cell having a cell constant of 0.5 cm–1 filled with 0.02 M solution of KCl at

298 K gave a resistance of 20.2 Ω. The water used for preparing the solution had a conductivity

of 7.1 × 10–6 S cm–1. Calculate the molar conductivity of 0.02 M KCl solution.


Convert 2.9 x 105 um to km


The equilibrium constant for the reaction

H₂(g) + S(s) ⇔H₂S(g) is 20.0 at 925K and 10.25 at 1000K, respectively. To calculate the standard enthalpy of the reaction.


calculate the entropy of a system

having 6.9 x 1010 microstates.


For the equilibrium 

 2SO2(g)+O2(g) 2SO3(g) Kc=245 (at 100 K) 

 The equilibrium concentrations are [SO2]=0.204 M,[O2]=0.0264 M and 

[SO3]=0.368 M. Suppose that the concentration of SO2 is suddenly halved calculate 

Qc.

The enthalpy of formation of NH3(g) as per the following reaction is -46.11 kJ/mol

at 298 K.

N2(g) + 3H2 (g) --> 2NH3(g)

Calculate the value of enthalpy of formation of NH3(g) at 100 °C. The Cp

values are given as: N2(g) = 29.12; H2(g) = 28.82; NH3(g) = 35.06. Assume the

given heat capacity values to be temperature independent in the range.


192 J of heat was supplied to a thermodynamic system and its internal energy was

found to decrease by 22 J. Calculate the amount of associated work and state

whether the work was done by the system or done on the system?


What is the minimum number of Calories expended by a 72.6 kg person who climbs a 30-story building? (Assume each flight of stairs is 14 ft high.) How many grams of glucose are required to supply this amount of energy? 


What quantity of heat energy is released when 455 g of liquid water freezes?


The decrease in the work function A for process at constant temperative  gives ____________ 

that can be obtained from the system during any change .


a Maximum work

b. Useful work 

c Net work

d. Minimum work.



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