High School

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In the laboratory, a student finds that it takes 149 Joules to increase the temperature of 13.7 grams of solid sulfur from 21.0 to 37.1 degrees Celsius.

Calculate the specific heat of sulfur she has measured in J/g·°C.

Answer :

In the laboratory a student finds that it takes 149 Joules to increase the temperature of 13.7 grams of solid sulfur from 21.0 to 37.1 degrees Celsius. The specific heat of sulfur she has measured is 0.67 J/g °C.

Specific heat is the quantity of heat energy needed to raise the temperature of a unit mass of a substance by a predetermined amount, typically one degree Celsius or one Kelvin. It's a characteristic that describes how well a material can hold and release thermal energy. The symbol "c" is commonly used to indicate a substance's specific heat, which is stated in terms of energy per unit mass per unit temperature change (for example, J/g°C or J/gK). Due to changes in how they interact with heat energy, different substances and phases (solid, liquid, and gas) can have varying specific heats.

c= q / m ×ΔT

= 149 / 13.7×(37.1 - 21.0)

= 149 / 13.7×16.1

= 149 / 220.57

= 0.67 J/g °C

To know more about specific heat, here:

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