How can you use congeal in a sentence?

She congealed the water into ice by putting it in the freezer

Congeal- to turn something from liquid to a solid state Although technically correct, your example is not, as congeal would never be used in reference to water. The spilt blood would eventually congeal into a gelatinous blob.
After the pudding still hadn't congealed after four hours, Marcus began to wonder what he had managed to do wrong this time.