Answer the following questions:
Define piezoelectridty and give one use of piezoelectric crystals.
(i) State Faraday’s First Law of Electrolysis.
(ii) How many electrons will folow when a current of 5 amperes is passed through a solution for 200 seconds?
(i) The mass of chemicals produced on consumed at any electrode depends on the magnitude of change passing through the solution.
such as,
m α Q
m = zQ = ZIT
here Z is constant
ii) Q = I x t = SA x 200 = 1000 C
Give reasons for the following:
(i) A reaction/process will be spontaneous when it is exothermic and randomness is increassing.
(ii) The number of hydronitun ions increase when one litre of water is added to 1M acetic acid.
What is the maximum work that scan be obtained by the isothermal expansion of one mole
of an ideal gas at 273 K from 2.24 dm3 to 22.4 dm3?