What is the energy change when the temperature of 11.4 grams of solid platinum is decreased from 38.6 °C to 20.5 °C ?

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Topic: Chemistry Posted 1 year ago

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Oct 1, 2023

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To calculate the energy change, we can use the specific heat capacity formula:

Q = mcΔT

Where:
- Q is the energy change
- m is the mass of the substance
- c is the specific heat capacity of the substance
- ΔT is the change in temperature

First, we need to determine the specific heat capacity of platinum. The specific heat capacity of platinum is 0.133 J/g°C.

Now we can calculate the energy change:

Q = (11.4 g) * (0.133 J/g°C) * (20.5 °C - 38.6 °C)
Q = (11.4 g) * (0.133 J/g°C) * (-18.1 °C)
Q = -31.68 J

The energy change when the temperature of 11.4 grams of solid platinum is decreased from 38.6 °C to 20.5 °C is -31.68 J.

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