Classify the following into exothermic and endothermic reactions.
(a) The formation of hydrogen chloride from hydrogen and chlorine
(b) The formation of nitrogen(II) oxide from nitrogen and oxygen
(c) The formation of hydrogen iodide from hydrogen and iodine
(d) The burning of coal
(e) The formation of water from hydrogen and oxygen
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Answer:
1 ) Endothermic Coz , Electricity as heat is needed. 2 ) Exothermic Coz , heat is released while burning Natural gas. 3 ) Endothermic Coz, Heat is needed to break down. 4 ) Exothermic Coz , While reacting with oxygen it release heat .
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Answer:
a . Exothermic reaction
b . Endothermic reaction
c . Endothermic reaction
d . Exothermic reaction
e. Endothermic reaction
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