Answer: -
236 g
Explanation: -
Solubility of KCl = 95 g/ dm³
Volume of the water = 200 cm³ = = 0.2 dm³
Amount of KCl dissolved = Volume of the water x Solubility
= 0.2 dm³ x 95 g/ dm³
= 19 g
Mass of water taken = 217 g
Total mass of solution = Mass of water + Amount of KCl dissolved
= 217 g + 19 g
= 236 g
Answer:-A. It is less than 890 kJ/mol because the amount of energy required to break bonds is less than the amount of energy released in forming bonds.
Explanation: Endothermic reactions are defined as the reactions in which energy of the product is greater than the energy of the reactants. The total energy is absorbed in the form of heat and for the reaction comes out to be positive.
Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and for the reaction comes out to be negative.
In the formation of new bonds more energy is released than is required to break the existing bonds, heat is released.
In the formation of bonds less energy is released than is required to break the existing bonds, heat is absorbed.
