Answer:
78.8°C
Explanation:
Given parameters:
Amount of heat energy = 130kCal
Mass of the cheese = 2.5kg
Initial temperature = 27°C
Unknown:
Final temperature = ?
Solution:
To solve this problem, use the expression below;
H = m C (T₂ - T₁)
H is the amount of heat
m is the mass
C is the specific heat capacity of water = 4200J/kg°C
Now,
convert the amount of heat to kJ;
1kCal = 4.18KJ
130kCal = 130 x 4.18 = 543.4kJ
Insert the parameters and solve;
543.4 x 10³ = 2.5 x 4200 x (T₂ - 27 )
543.4 x 10³ = 10500 x (T₂ - 27 )
(T₂ - 27 ) = 51.75
T₂ = 51.75 + 27 = 78.8°C
The correct option is D.
Alchemists are early chemical scientists, who first delved into the subject of chemistry. These early scientists were able to study the characteristics of common elements, the features of compounds and some of the laboratory methods that they developed then were found useful by later scientists. One thing that alchemists are known for is their quest to turn lead into gold.
The violet light has the shortest wavelength.
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