A metal cools from an initial temperature of 225 oc to 25 oc and releases 160 j of heat energy. If the mass of the metal is 5. 0 g, what is its specific heat capacity?.

Respuesta :

Answer:

0.17 J/g*C

Explanation:

Specific heat capacity will have units of heat per unit mass, per degree temperature.  Using the units provided here, we would expect to find a specific heat expressed as J/(g*C).  This can be read as the energy required to raise 1 gram of the material 1 degree C.  Or it can be read as the amount of energy that needs to be removed to reduce the temperature of 1 gram of material by 1 degree C.

We are given the three values needed to determine specific heat capacity.  Just piut them together in a manner that will result in the correct unit:  J/(g*C).

160 J released

5.0 g metal

A temperature change of (225-35) or 190C.

We want J/(g*C)

  160J/(5.0g*190C) = 0.1684 J/g*C or 0.17 J/g*C for 2 sig figs