Question

It takes 2.52 × 10^5 J of heat to melt 4.00 kg of a substance. According to the table (attached inside!), what is the substance?

copper, iron, silver, or gold

**not sure! thank you:)

Answer 1

we have to find the heat capacity

Answer 2

well...find the amount of heat needed to melt 1 kg of substance

Answer 3

so we have to compute this:
\[\Large C = \frac{Q}{m}\]

Answer 4

where Q=2.52 × 10^5 J and m= 4Kg

Answer 5

okay! so 2.52 * 10^5 / 4 = 63000 ?

Answer 6

ok!

Answer 7

so that means 6.3 * 10^4? so our substance is gold?

Answer 8

that's right!

Answer 9

yay!! thank you:)

Answer 10

thank you!! :)