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Answer :
Final answer:
The energy change when the temperature of 14.8 grams of solid iodine is decreased from 38.5 °C to 20.2 °C is approximately -57.96 Joules.
Explanation:
The energy change when the temperature of 14.8 grams of solid iodine is decreased from 38.5 °C to 20.2 °C can be calculated using the equation:
Q = mcΔT
where Q is the energy change, m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature.
In this case, we need to use the specific heat capacity of iodine, which is 0.214 J/g°C. Plugging in the values:
Q = (14.8 g)(0.214 J/g°C)(20.2 °C - 38.5 °C)
Q = (14.8 g)(0.214 J/g°C)(-18.3 °C)
Q = -57.96 Joules
Therefore, the energy change when the temperature of 14.8 grams of solid iodine is decreased from 38.5 °C to 20.2 °C is approximately -57.96 Joules.
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