A 4.7-kg block of ice originally at 263 K is placed in thermal contact with a 16.2-kg block of silver (cAg = 233 J/kg-K) which is initially at 1067 K. The H2O - silver system is insulated so no heat flows into or out of it. At what temperature will the system achieve equilibrium?

Respuesta :

Answer:

The temperature will be "338 K".

Explanation:

The given values are:

[tex]c_{Ag}=233 \ J/kg-K[/tex]

Temperature, [tex]\Delta \ T=263 \ K[/tex]

As we know,

⇒  [tex]Heat \ gain \ by \ ice = Heat \ last \ by \ silver[/tex]

[tex]m_{ice}c_{ice} \Delta \ T+m_{ice}L_{ice}+m_{ice}c_{w} \Delta \ T=m_{Ag}c_{Ag} \Delta \ T[/tex]

On putting the values, we get

[tex]Q_{ice}=4.7\times 2030(273-263)+4.7(330\times 10^3)+4.7\times 4186(TK-273K)[/tex]

⇒     [tex]=-3724646.6 \ J+19674.2 \ T[/tex]

[tex]Q_{Ag}=16.7\times 233(1087-T)[/tex]

⇒     [tex]=4229625.7-3891.1 \ T[/tex]

Now,

System's final temperature will be:

                                  [tex]Q_{ice}=Q_{Ag}[/tex]

[tex]-3724646.6 \ J+19674.2 \ T=4229625.7-3891.1 \ T[/tex]

                                      [tex]T=338 \ K[/tex]

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