An unknown metal alloy with a mass of 390 g is taken from boiling water and dropped into

An unknown metal alloy with a mass of 390 g is taken from boiling water and dropped into an insulated cup that contains 553 g of water at an initial temperature of 18.7°c. the final temperature of the system is 26.8°c. what is the metal's specific heat capacity?

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  1. so specific heat capacity of unknown metal is 656.8 J/degree C kg

    Explanation:

    Here by energy balance we can say that energy given by metal alloy at 100 degree = heat absorbed by water at 18.7 degree C

    now we have

    [tex]Q_{in} = Q_{out}[/tex]

    [tex]390 s (100 - 26.8) = 553 (4186 ) ( 26.8 - 18.7)[/tex]

    [tex]28548 s = 18750349.8[/tex]

    now we have

    [tex]s = \frac{18750349.8}{28548}[/tex]

    [tex]s = 656.8 J/kg ^o C[/tex]

    so specific heat capacity of unknown metal is 656.8 J/degree C kg

  2. It won't lose or gain electrons if it's a covalent bond it shares the electrons with another atom or atoms. if it is an ionic bond it will lose the 3 electrons on the outer shell and become a positively charged ion.  credit goes to @sunshinebaby of answers.yahoo.com.

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