Is the process of bananas ripening a chemical change or a physical change? Explain.

True or False When a physical change occurs,  a change in state occurs which indicates that a new substance has been formed.

We are doing an experiment on measuring the temperature. We are to measure the temperature of hot water (measure it initially, then wait for 10 minutes then measure again). Additionally, we are to measure the temperature of another water before and after putting ice (measure initially then measure 3 times [every 5 minutes] for 15 minutes). My question are: What law or principles of chemistry could be applied in this experiment? Should we expect the temperature of the hot water to drop? why? Should we expect the temperature of the water to rise or drop after putting the ice? why?

Is the boiling point of a chemical a physical property or chemical property?

Define physical change and list several common physical changes.