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unicornqueen30
22.05.2020 •
Physics
A 200.0 g china serving bowl is warmed 65.0°C when it absorbs 2.6 kcal of heat from a
serving of hot food. What is the specific heat of the china dish?
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Ответ:
837.2 J/kg.oC
Explanation:
Mass of China dish, m = 200g
Change in temperature, ΔT = 65.0°C
The heat energy, Q = 2.6 kcal = 2600 cal
The relation between the heat flow and specific heat is given as:
Q = mcΔT
Therefore, the specific heat of the China dish is:
c = Q/mΔT = (2600cal)/(200g)(65.0°C) = 0.2 cal/g.°C
Note:
1 cal = 4.186 J
1 g = 10^-3 kg
Therefore, week have:
c = (0.2)(4.186/10^-3) J/kg.oC
= 837.2 J/kg.oC
Ответ: