Reddi tstudent has a thin copper beaker containing 100 g of a pure metal in the solid state. the metal is at 215°c, its exact melting temperature. if the student lights a bunsen burner and holds it for a fraction of a second under the beaker, what will happen to the metal?

Explanation:

A point of temperature at which both solid and liquid state of a substance remains in equilibrium without any change in temperature then this temperature is known as melting point.

For example, melting point of water is . So, at this temperature solid state of water and liquid state are present in equilibrium with each other.

Therefore, when a 100 g of given pure metal in solid state is heated at its exact melting point which is then some of the solid will change into liquid state but the temperature will remains the same.  

your answers are a,b,,e and f

i hope this

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.