A 98.0°C piece of cadmium (c=.850J/g°C) is placed in 150.0g of 37.0°C water. After sitting for a few minutes, both have a temperature of 38.6°C. What was the
Chemistry
taebandz2000
Question
A 98.0°C piece of cadmium (c=.850J/g°C) is placed in 150.0g of 37.0°C water. After sitting for a few minutes, both have a temperature of 38.6°C. What was the mass of the cadmium sample?
1 Answer

1. User Answers zoexoe
The answer is 19.9 grams cadmium.
Assuming there was no heat leaked from the system, the heat q lost by cadmium would be equal to the heat gained by the water:
heat lost by cadmium = heat gained by the water
qcadmium = qwater
Since q is equal to mcΔT, we can now calculate for the mass m of the cadmium sample:
qcadmium = qwater
(mcadmium)(0.850J/g°C)(38.6°C98.0°C)) = 150.0g(4.18J/g°C)(38.6°C37.0°C)
mcadmium = 19.9 grams