Calculate the amount of heat energy required to raise the temperature of 2g of mercury[specific heat capacity 0.12J g-10 C-1] from 10degree C to 30degree C?
Options:
A. 3.0J. B. 3.5J. C. 4.0J. D. 4.8J
what is your difficultly here? this is the simplest of simple thermodynamic problems.
heat=mass*specificheatcapcity*changeTemp
Thank You.
To calculate the amount of heat energy required to raise the temperature of a substance, you can use the formula:
Q = m * c * ΔT
Where:
Q = heat energy (in joules)
m = mass of the substance (in grams)
c = specific heat capacity of the substance (in J g^-1 °C^-1)
ΔT = change in temperature (in °C)
In this case, the mass of the mercury is given as 2 grams (m = 2g), the specific heat capacity of mercury is given as 0.12 J g^-1 °C^-1 (c = 0.12 J g^-1 °C^-1), and the change in temperature is from 10°C to 30°C (ΔT = 30 - 10 = 20°C).
Plug these values into the formula:
Q = 2g * 0.12 J g^-1 °C^-1 * 20°C
Simplifying the calculation:
Q = 4.8 J
Therefore, the amount of heat energy required to raise the temperature of 2g of mercury from 10°C to 30°C is 4.8 J.
So the correct option is D. 4.8J.