The amount of heat needed to raise the temperature of 25 g or a substance by 15°C is 915 J. What is the specific heat of the substance?

Question

5655 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-05-07T21:00:20

#s=2.44J/(g*""^@C)#

The amount of heat (#q#) absorbed by the system in this case could be expressed as follows:

#q=mxxsxxDeltaT#

Where, #m# is the mass of the substance,

#s# is the specific heat capacity of the substance,

and #DeltaT# is the change on temperature during the heating process.

Thus, the specific heat capacity could be found by:

#s=q/(mxxDeltaT)=(915J)/(25gxx15^@C)=2.44J/(g*""^@C)#

Here is a video that explains this topic in more details:
Thermochemistry | Enthalpy and Calorimetry.