the specific heat of copper is 0.09 cal /g °C. how much heat will be required to increase the temperature of a piece of copper weighing 70 g by 20 °c
Answers
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Explanation:
he correct answer is: 0.9 cal
Explanation:
The formula for the specific heat (s) is:
s = (q)/(m * ΔT) --- (1)
Where
s = Specific heat = 0.09 cal/g°C
m = mass (make sure it is in GRAMS) = 70g
ΔT = Change in temperature = 21° - 20° = 1°
q = Heat Energy = ?
Plug in the values in the Equation (1):
(1) => q = (70*1*0.09) = 6.3 cal
Given: Specific heat of copper = 0.09 calorie/gram °C
Change in temperature ΔT = 20°C
Weight of copper = 70gram
To find: Heat required to increase the temperature
Solution: Specific heat capacity is the amount of heat required to change the temperature of a substance by one degree of a unit mass of the substance.
The heat energy required to change the temperature of a substance is the product of the mass of a substance, specific heat capacity, and change in temperature. It is represented by -
ΔH = mcΔT
Where m is the substance, c is the specific heat, and ΔT is the change of temperature.
ΔH = 70×0.09×20
= 126 calorie
Therefore, the heat required to change the temperature b 20°C is 126 Calories.