Question

10. If a solid piece of iron is heated and remains at 80°C until it is completely melted, you know that 80°C is (2 pts) *
a. the freezing point of iron
b. the melting point of iron
c. the boiling point of iron
d. both the freezing and melting points of iron

my answer would be B but some how i might think its D, could someone help

Answer 1

The freezing point and the melting point are the same so D is correct.It's called the melting point if it is solid going to liquid at that T; it's called the freezing point if it is going from the liquid to the solid at that T.

Answer 2

Note that iron will NOT melt at 8- C. The melting point of Fe is a little more than 1500 C.