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(b) (i) Define the electrical energy and the mechanical energy.
(ii) Calculate the heat of combustion of butane gas (C4H10) if its heat of formation is -124 kJ mol-1.The
Heats of formation of CO2 (g) and H2O(l) are -395 kJ mol-1 and -287 kJ mol-1, respectively.
(c) Write down the complete equations of the following equations.
(i) CH3-CH2-COONa + NaOH → ?

       (ii) CH3-CH2-OH          H2SO4(conc)      ?            

       (iii) CH3-CH2-OH         Al2O3         ?

       (iv) CH3-CH2-Cl   + KOH       ethanol        ?