The amount of heat evolved when `500cm^(3)` of 0.1M HCl is mixed with `200cm^(3)` of 0.2 M NaOH isA. 2.292 kJB. 1.292 kJC. 0.292 kJD. 3.392 kJ

The amount of heat evolved when `500cm^(3)` of 0.1M HCl is mixed with

1.	The amount of heat evolved when `500cm^(3)` of 0.1M HCl is mixed with `200cm^(3)` of 0.2 M NaOH isA. 2.292 kJB. 1.292 kJC. 0.292 kJD. 3.392 kJ
Answer» Correct Answer - A Mili-equivalent of HCl = `500xx0.1` =50 milli-moles = 0.05 moles Milli-equivalent of NaOH= `200xx0.2` = 40 milli-moles = 0.04 moles When 1 mole of `H^(+)` ions and 1 mole of `OH^(-)` ions are neutralized, 1 mole of water is formed and 57.1 kJ of energy is released. 0.04 moles of `H^(+)` ions react with 0.04 moles of `OH^(-)` ions to form 0.04 moles of water molecules. Heat evolved = `0.04xx57.1=2.29 kJ`.

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