Ideally, when a thermometer is used to measure the temperature of an object, the

Question

Ideally, when a thermometer is used to measure the temperature of an object, the temperature of the object itself should not change. However, if a significant amount of heat flows from the object to the thermometer, the temperature will change. A thermometer has a mass of 31.2 g, a specific heat capacity of c = 826 J/(kg C °), and a temperature of 11.5 °C. It is immersed in 172 g of water, and the final temperature of the water and thermometer is 51.6 °C. What was the temperature of the water in degrees Celsius before the insertion of the thermometer?

Explanation / Answer

comparing heatbefoe and after

31.2*.826*11.5 + 172 *2.108*y = 31.2*826*51.6 + 172 *2.108*51.6

296.3+172 *2.108*y= 1329.7+18714.2

y = 54.46

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