How much heat is given off by 1,000 kg of iron when it solidifies at its melting point?

2.66×10^8 J

2.66×10^7 J

3.76×10^−3 J

2.66×10^2 J

Substance Heat of Fusion (Jkg/)
copper 2.05×10^5
iron 2.66×10^5
silver 1.04×10^5
lead 2.04×10^4
gold 6.30×10^4

i think the answer is 2.66×10^8 J ? am i right?

Question

How much heat is given off by 1,000 kg of iron when it solidifies at its melting point?

2.66×10^8 J

2.66×10^7 J

3.76×10^−3 J

2.66×10^2 J

Substance Heat of Fusion (Jkg/)
copper 2.05×10^5
iron 2.66×10^5
silver 1.04×10^5
lead 2.04×10^4
gold 6.30×10^4

i think the answer is 2.66×10^8 J ? am i right?

justjm · Answer

$1000\ kg\ Fe\ \times\frac{2.66\times10^{5}\ J}{1\ kg\ Fe} = 2.66\times10^{8} \ J$

You are correct

jennylove · Answer

Thank you!(: