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Shweta Thakur posted an Question
June 30, 2020 • 20:06 pm
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30 points
30 points
- IIT JAM
- Chemistry (CY)
Please tell that bond enthalpy of neutralization of hf+ n aoh is greater than 57.1 kilojoule / equivalent why
please tell that Bond enthalpy of neutralization of HF and N A is greater than 50 7.1 kilo
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Suman Kumar
Once again I am reminded you enthalpy of neutralization is energy released for formation of 1 mole of water
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Suman Kumar
Strong acid & strong base completely dissociate so it releases 57.1 kj but weak acid & weak base doesn't dissociate completely so it releases less energy
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Suman Kumar
When ever there is formation of 1 mole of H2O from acid-base neutralization amount of energy released is 57.1 Kj . Enthalpy of neutralization is defined as neutralization of 1 gram equivalent acid base.
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Priyanshu kumar
and if there is weak acid and weak base then dissociation is partial so we have to take help of some mineral acid or some alkali so enthalpy of neetralisation is less than -57.1kj/mole
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Priyanshu kumar
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so always keep in mind when there is strong acid and strong base...then -57.1 Kj/mole of heat is releases
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Priyanshu kumar
got shweta
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sir but I'm one video I have seen that enthalpy of neutrilazation of HF and naoh is greater because here is enthalpy of hydration also involves
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https://www.toppr.com/ask/question/heat-of-neutralisation-of-hf-aq-a-weak-acid-with-naoh-aq-is-more-than/ see this shwetq
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Priyanshu kumar Best Answer
see shweta when neutralisation occurs between strong acid and strong base then there is complete disaociation so no cation and anion occurs in the complete reaction rather H+ + OH- =H2O is present so always enthalpy of neutralisation is same
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Suman Kumar
https://www.google.com/url?sa=t&source=web&rct=j&url=https://socratic.org/questions/what-is-the-net-ionic-equation-for-the-reaction-between-hf-a-weak-acid-and-naoh&ved=2ahUKEwj0j5GSnKnqAhWf73MBHYlqDQQQFjADegQIARAB&usg=AOvVaw3gdHXUZM096TR-vxnwAjB0&cshid=1593509222694