Which of the following has the lowest melting point?
a. ) diamond
b. ) CaCl2
c. ) PCl5
d. ) Fe
e. ) they all exhibit the same melting point
2006-12-03 14:37:13 · 4 answers · asked by Ali A 2 in Science & Mathematics ➔ Chemistry
Diamond = 3550 °C
CaCl2 = 772 °C
PCl5 = 179–181 °C
Fe = 1538 °C
So its PCl5
2006-12-03 14:46:07 · answer #1 · answered by Math-Chem-Physics Teacher 3 · 0⤊ 0⤋
want to say that the answer is B, but I'm not 100%. A and D would be a couple thousand degrees, especially A. That also takes out E.
2006-12-03 14:47:46 · answer #2 · answered by Deathgrip 4 · 0⤊ 1⤋
c)PCl5 because it has intermolecular weak van der waals force
diamond is bonded by strong covalent bond
Fe is bonded by strong metallic bond
CaCl2 is bonded by strong ionic bond
2006-12-03 14:45:54 · answer #3 · answered by random people 2 · 1⤊ 0⤋
acoording to me it is diamond which has low melting points. it changes to carbon i.e. black in colour when heated
2006-12-03 14:45:54 · answer #4 · answered by Aditya N 2 · 0⤊ 1⤋