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To test heat of solution you first mix 80 mL of water and 10g of NH4Cl,...

To test heat of solution you first mix 80 mL of water and 10g of NH4Cl, but in the next trial use 100mL and 12g of NH4Cl. In which trial will you see a larger temperature change of the solution? This process is endothermic.

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Answer #1

Assuming the density of water to be 1 g/cc.   Mass of water in trial-1= 80gm and trial-2 =100gm

mass of solution in trial-1 = 80+10=90 gm and trial-2= 100+12= 112 gm

heat of solution =and mass* specific heat* temperature change

since heat of solution is same in both the cases, specific heat is assumed to be same, temperature change will be maximum for the case where the mass is minimum. for 80 gm of water and 10 gm of NH4Cl, temperature change will be maximum.

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