1.

The amount of heat evolved when 0.50 mole of HCl is mixed with 0.30 mole of NaOH solution isA. 57.1 kJB. 28.55 kJC. 11.42 kJD. 17.13 kJ

Answer» Correct Answer - D
`"0.50 mol of HCl "-="0.50 mol of "H^(+)`
`"0.30 mol of NaOH "-="0.30 mol of OH"^(-1)`
`H^(+)+OH^(-) rarr H_(2)O" (Neutralisation)"`
`"0.30 mol of HCl" -="0.30 mol of H"^(+)`
`"or 0.30 mol of "H^(+)-=" 0.30 mol of "OH^(-)`
`"Heat evolved with 1 mol H"^(+)="57.1kJ"`
`"Heat evolved with 0.30 mol H"^(+)=57.1xx0.30="17.13 kJ"`


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