refluxing

"I expect the house to be spotless upon my return."

"The teacher explained the new math concept quickly. "

"Water is a common solvent that can dissolve sugar. "

"He listened carefully to his mother's concerns, feeling sorrowful about her disappointment. "

"Boil some water in a pan."

"The chemistry class focused on how different elements combine to form new substances. "

"He is a student of life."

"The announcement of the verdict brought a violent reaction."

"The teacher monitored the students carefully during the exam to prevent cheating. "

"The lemonade was a clear solution of lemon juice and water. "

"My parents are ensuring my younger sister gets to school on time every day. "

"The air conditioner uses a condenser to cool the refrigerant gas, turning it into a liquid that helps cool the room. "