Determine the specific heat of the unknown second sample? The answer is not 0.45

Question

Determine the specific heat of the unknown second sample? The answer is not 0.457 J/kg•degC
010 points 1 Presious Answers My Notes Ask Your Te 0/10 points 1 Previous Answers A 100 g aluminum calormeter contains 250 g of water. The two substances are in thermal equilbrium at 10°C. Two metalic blocks are placed in the water. One is a 50 g piece of copper at 85°C. The other sample has a mass of 66 g and is orniginally at a temperature of 100°C. The entire system stabilizes at a final temperature of 20°C Determine the speafic heat of the unknown second sample 0457 AST Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. J/kg Need Help? Telk to Tuter

Explanation / Answer

Here, heat lost   = heat gained

=>     50 * 0.385 * (85 - 20)   +   66 * s * (100 - 20)    =     100 * 0.900 * (20 - 10)   +   250 * 4.184 * (20 - 10)

=>      1251.25   + 66 * s * (100 - 20)    =    900 + 10460

=>      66 * s * (100 - 20)    =    10108.75

=>   s   =    1.9145     J/g•degC         ------------------>    specific heat of unknown sample  

Related Questions

Navigate

• Browse (All)
• Browse D
• Subjects

---

---

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