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  4. The amount of heat evolved when 500 cm3 of 0.1 M HCl is mixed with 200 cm3 of 0.2 M NaOH is

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Q. The amount of heat evolved when $500 \,cm^3$ of $0.1 \,M \,HCl$ is mixed with $200\, cm^3$ of $0.2\,M \,NaOH$ is _______

KCETKCET 2010Some Basic Concepts of Chemistry

Solution:

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$\because$ In neutralisation of 1 mole of $NaOH$ by 1 mole HCl, heat evolved $=57.3\, kJ$

$\therefore $ To neutralise $0.04$ mole of $NaOH$ by

$0.04$ mole of $HCl,$

heat evolved will be $=57.3 \times 0.04\, kJ$

$=2.292\, kJ$