Doesn't look like it's sublimating. However, I think you could improve this by choosing a darker pan so there is more contrast in the scene. I would also allow more room at the top because you are trying to show how a solid goes to a gas without first becoming a liquid so the vapor is a primary element. Might also be better to use dry ice next time too.
Don't see any opposites. Way out of focus. Can't quite figure out if this is ice being dropped in a glass of water or sitting on something (the circular grooves would suggest it is sitting on something but what?)
I'm not understanding this image. Melting ice? ice and steam? Solid ice and water drops? Anyway, the monochromatic scheme isn't giving your picture any life. The image doesn't convey OPPOSITES to me, except with a stretch.
I don't find this image very appealing. The colors are dull, like the photo was overexposed or brightened too much. The focus looks a little soft. Overall the subject is boring too. There is nothing that makes you go "wow".
I wish there were more color here, mabey a flash light with a bit of colored plastic over the end would have really brought some needed definition to the dropletr and the steam. I really like the idea, it could have been sublime with stronger lighing.