How much energy (in J) is lost when a sample of iron with a mass of 28.3 g cools from 66.0 degrees celsius to 24.0 degrees celsi
1 answer:
Answer:
Q = -535 J.
Explanation:
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In this case, according to the given information, it turns out possible for us to calculate the lost energy according to the following and generic heat equation:
Thus, since the specific heat of iron is 0.450 in the SI units, we can plug in the mass and temperatures to obtain:
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Answer: The range of wavelengths of light that can be used to cause given phenomenon is .
Explanation:
Given: 222 kJ/mol (1 kJ = 1000 J) = 222000 J
Formula used is as follows.
where,
E = energy
h = Planck's constant =
c = speed of light =
Substitute the values into above formula as follows.
Thus, we can conclude that the range of wavelengths of light that can be used to cause given phenomenon is .