Let's say, I have H_2O, BF_3, CH_4, NaF, and HF. How do I figure out which substance has the highest melting point?
Thank you
2007-10-24 16:41:13 · 2 answers · asked by guyava99 2 in Science & Mathematics ➔ Chemistry
The easiest way would be to look them up in a reference such as the CRC Handbook.
If you mean do an experiment to find out, it wouldn't be very hard because: In the case of these materials, you could tell by looking at them, CH4. HF and BF3 are gases at room temp (they are above their boiling points) H2O is a liquid at RT (it is above it's melting point at RT) NaF is the only one on the list that is a solid at RT; so it has the highest mp.
2007-10-24 16:58:38 · answer #1 · answered by Flying Dragon 7 · 0⤊ 0⤋
lattice energy. If a substance has a high lattice energy, then the molecules will 'want to stay together more' and will have a higher melting point. If the molecules don't have a strong attraction to each other, then to substance will have a lower melting point.
2016-05-25 17:20:48 · answer #2 · answered by marietta 3 · 0⤊ 0⤋