Whal is the energy change when the temperature of 14.3 grams of solid diamond is

Question

Whal is the energy change when the temperature of 14.3 grams of solid diamond is decreased from 36.5 degree C to 22.7 degree C? Answer Joules What is the energy change when the temperature of 13.4 grams of solid platinum is decreased from 39.5 degree C to 23.7 degree C? Answer: Joules. A sample of solid platinum is healed when an electrical coil. If 28.2 Joules of energy are added to a 13.4 gram sample and the final temperature is 39.5 degree C, what is the initial temperature of the platinum? Answer: degree C. A sample of solid gold is heated with an electrical coil. If 28.9 Joules of energy arc added to a 12.1 grain sample and the final temperature is 38.5 degree C. what is the initial temperature of the gold? Answer: degree C.

Explanation / Answer

(a) Specific heat ofSolid Diamond = 0.519 J/gC

Joules = m*C*(T1-T2) = 0.519*14.3*3.8= 54.34

(b) C =0.133

J = 0.133*13.4 = -27.62

(c) 28.2 = 0.133*13.4*(39.5 - T1)

T1 = 23.67

(d) 28.9= 0.133*12.1(38.5 - T1)

T1 = 20.54

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