state the characteristics of chemical reaction give atleast one example in each
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The characteristics of chemical reaction ➡
1) In a chemical reaction the colour of reactants may change .
2) The state of reactants can also change
3) But the mass of the r eactants will never change .
Example ➡ NaOH + HCl ----> NaCl+ H2O
1) In a chemical reaction the colour of reactants may change .
2) The state of reactants can also change
3) But the mass of the r eactants will never change .
Example ➡ NaOH + HCl ----> NaCl+ H2O
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1) Irreversable reaction - mg+ o2 = 2mgo+ heat + light
2) reversable - caco3 = cao + co2 - heat
3) homogeneus reaction - n2 +3h2 = 2nh3+ heat
4)Exothermic - c+ o2 = co2 + 395kj
5) Endothermic - caco3 - cao + co2
6)photochemical - agcl2 - ag + cl2
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