Answer:
The gold gains a total of 2.468 kilo-joules of energy.
Explanation:
Total heat or energy gained by the gold is equal to heat applied and heat required to melt the gold completely.
Total energy = Q+ Q'
Heat of fusion of gold =[tex]\Delta H_{fus} =63.5 joules/gram[/tex]
Mass of gold melted ,m= 12.5 g
Specific heat of gold ,c= 0.1291 joules/gram °C
Change in temperature = ΔT = 1064°C - 26°C = 1038 °C
Heat of applied to the gold = Q
[tex]Q=mc\Delta T[/tex]
[tex]Q'=\Delta H_{fus}\times m[/tex]
Total energy = Q+ Q'
[tex]=12.5 g\times 0.1291 joules/gram ^oC\times 1038 ^oC+63.5 joules/gram\times 12.5 g[/tex]
= 2,468.82 Joule= 2.468 kilo-Joule
The gold gains a total of 2.468 kilo-joules of energy.
Answer:
2,450 ( Make sure you add the comma ) :D
Explanation:
I got it correct in my test :)
