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    <pre style="white-space:pre-line"><code>7.THERMOCHEMISTRY                                             eLearn.Punjab

	 For example, standard enthalpy of combustion of ethanol DH0c is -1368kJ mol-1. The reaction
is represented by the following equation.

			

C2H5OH(ï¬) + 3O2(g)  â†’ 2CO2(g) + 3H2O(ï¬)  DHoc =-1368kJ molâˆ’1

                                              Animation 7.12: Enthalpy of Combustion (DHc)
                                                            Source & Credit : wikipedia

7.4.6 	 Enthalpy of Solution (DHosol.)

	 The standard enthalpy of a solution is the amount of heat absorbed or evolved when one
mole of a substance is dissolved in so much solvent that further dilution results in no detectable
heat change.
	 For example, enthalpy of solution (DHosol.) of ammonium chloride is +16.2 kJmol-1 and that
of sodium carbonate is -25.0 kJmol-1. In the first case, heat absorbed from the surroundings is
indicated by cooling of the solvent (water), an endothermic process. While in the second case, the
temperature of the solvent rises showing that the process is exothermic.

                                                      20</code></pre>
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