Apiece of unknown metal weighs 348g. when the metal piece absorbs 6.64kj of heat , its temperature increases from 24.4c to 43.6c. determine the specific heat of this metal. then, look up the specific heat and identify the metal

This metal could be the aluminium with a specific heat of

Explanation:

A pie of unknown metal presents a mass (M) of 348 g. This metal is heated using energy (E) of 6.64 kJ and the temperature increases from T1 =24.4 to T2 =43.6°C. We can calculate the specific heat (H) of this metal as follows

We can replace previously presented data in this equation. After simplifying and converting to adequated units, we found that

Finally, the specific heat of this metal is

The aluminium could be the metal, its specific heat is similar to that found in this problem.

Finally,  we can conclude that this metal could be the aluminium with a specific heat of

b is the correct answer

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your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.