When 0.811 g of NH₄NO₃ was added to 150.0 g of water in a Styrofoam cup,the temperature dropped by 0.413°C.The heat capacity of H₂O is 4.18 J/g°C.Assume the specific heat of the solution equals that of pure H₂O and that the calorimeter neither absorbs nor leaks heat.The molar heat of solution of solid NH₄NO₃ is: A)+257 J/mol B)+25.7 kJ/mol C)+2.57 kJ/mol D)-2.57 kJ/mol E)-257 J/mol

Question

Quizplus · Accepted Answer

The heat absorbed by the solution is calculated using q = mcΔT, where m is the mass of the solution (150.811 g), c is the specific heat capacity (4.18 J/g°C), and ΔT is the temperature change (0.413°C). The calculated q is then divided by the moles of NH₄NO₃ to find the molar heat of solution.

When 0811 G of NH4NO3 Was Added to 150

When 0811 G of NH₄NO₃ Was Added to 150