Answer to Question #55960 in General Chemistry for tracy guido
The dissolving process is endothermic. The reaction absorbs approximately 326 J/g of ammonium nitrate. To lower the temperature of 220. g of water by 20.0°C, how many grams of ammonium nitrate would you need to dissolve?
Q = cmΔT and Q = 326x, where x is a mass of ammonium nitrate.
The final equation is cmΔT = 326x;
x = cmΔT/326 = 4200*0.22*20/326 = 56.69 g
Answer: 56.69 g
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