2g of ammonium chloride is dissolved in 20cm3 of tap water whose initial temperature is 23°C. What is the temperature of the solution after all the ammonium chloride has dissolved?
Molar mass of NH4Cl = 53.491
2/53.491= 0.0374mol
20/1000= 0.02
= 0.0374/0.02= 1.87
= 23×1.87= 42.998°C
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