🤓 Based on our data, we think this question is relevant for Professor Johnston's class at Otterbein College.
During phase changes the signs for ΔH and ΔS are the same.
Breaking bonds requires absorbing energy (+ΔH) and increasing disorder (+ΔS)
Forming bonds requires releasing energy (- ΔH) and decreasing disorder (- ΔS)
Sublimation: phase transition from solid to gas state. Need energy to melt solid into gaseous form which means this is an endothermic process, so ΔH will be positive. Disorder increases as we transition from solid --->liquid---->gas, ΔS will be positive as well...
For each phase change, determine the sign of ΔH and ΔS.
Sublimation ,Freezing, Condensation, Deposition, Boiling , Melting
b) -ΔH, -ΔS
c) +ΔH, -ΔS
d) -ΔH, +ΔS
Put the phase change to the correct sign of ΔH and ΔS
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Spontaneous Reaction concept. You can view video lessons to learn Spontaneous Reaction. Or if you need more Spontaneous Reaction practice, you can also practice Spontaneous Reaction practice problems.
What professor is this problem relevant for?
Based on our data, we think this problem is relevant for Professor Johnston's class at Otterbein College.