5
Question
Are all reactions either exothermic or endothermic ?
H2+O2 --> H2O
Is itexothermic or endothermic ?
H2+O2 --> H2O
Is itexothermic or endothermic ?
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Solution
Reactions may be exothermic or endothermic. If in a reaction heat energy is absorbed its endothermic and if heat energy is liberated its exothermic.
Ex.,
NH4Cl(s) + H2O ---- > NH4Cl(aq)
This reaction is endothermic reaction.
CH4 + 2O2 ----- > CO2 + 2 H2O
This reaction is exothermic reaction.
The reaction H2+O2 --> H2O is an exothermic reaction as lot of heat energy is liberated.
Ex.,
NH4Cl(s) + H2O ---- > NH4Cl(aq)
This reaction is endothermic reaction.
CH4 + 2O2 ----- > CO2 + 2 H2O
This reaction is exothermic reaction.
The reaction H2+O2 --> H2O is an exothermic reaction as lot of heat energy is liberated.
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