2. Two solid objects, A and B, are placed in boiling water and allowed to come t

Question

2. Two solid objects, A and B, are placed in boiling water and allowed to come to temperature there. Each is then lifted and placed in separate beakers containing 100 g water at 10.0°C. Object A increases the water temperature by 3.50°C; B increases the water temperature by 2.60°C. Which object has the larger heat capacity? Explain your reasoning. Why is it reasonable to assume the specific heats of NaOH and HCl solutions are the same as water, 4.18 J/g.°C? 3. 4. When a 3.76 g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee-cup calorimeter, the temperature drops from 22.0°C to 16.9°C. Calculate AH (in kJ/mol NH,NO,) for the solution process: NH,No,(s)-NH,, (aq) + NO3(aq) Assume that the specific heat of the solution is the same as that of pure water, and determine whether this process is endothermic or exothermic.

Explanation / Answer

Ans 2

Mass of water = 100 g

Initial temperature of water = 10°C

Object A increases water temperature by 3.50°C

Object B increases water temperature by 2.60°C

Object A increases the water temperature more

Object A has more heat energy than object B

Therefore

specific heat of Object A > specific heat of object B

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.