Pick the best answer/response
The specific heat of a substance is 0.215 J/g°C. How much energy is required to raise the temperature of 20 g of the substance from 72°C to 88°C?(1 point)
Responses
A) 323.4 J
B) 3.4 J
C) 68.8 J
D) 4.3 J
wow the answer is C, by now I should know I can't rely on the automatic responses.
A) 323.4 J
To calculate the energy required to raise the temperature of a substance, you can use the formula:
Energy = mass x specific heat x change in temperature
Given:
Specific heat = 0.215 J/g°C
Mass = 20 g
Change in temperature = 88°C - 72°C = 16°C
Plugging the values into the formula:
Energy = 20 g x 0.215 J/g°C x 16°C = 68.8 J
Therefore, the correct answer is C) 68.8 J.
The specific heat of a substance is a property that tells us how much energy is required to change the temperature of a certain amount of the substance by a certain amount. In this case, the specific heat of the substance is given as 0.215 J/g°C.
To calculate the amount of energy required to raise the temperature of the substance from 72°C to 88°C, we can use the following formula:
Energy = mass × specific heat × change in temperature
Given that the mass of the substance is 20 g, the specific heat is 0.215 J/g°C, and the change in temperature is (88°C - 72°C) = 16°C, we can substitute these values into the formula:
Energy = 20 g × 0.215 J/g°C × 16°C = 68.8 J
Therefore, the correct response is:
C) 68.8 J