CSEC Chemistry · May/June 2010 · Paper 1 · Question Q36
When crystals of potassium nitrate are dissolved in water, the temperature of the solution decreases because
- (A)energy is required to break down the crystal structure of the potassium nitrate
- (B)heat is always absorbed when a substance dissolves
- (C)the energy content of dissolved potassium nitrate is lower than that of solid potassium nitrate
- (D)the energy content of dissolved potassium nitrate is higher than that of solid potassium nitrate
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