What kind of thermometer is used to determine the depression of freezing point?

Which expression represents a reaction rate?

Which one of the following choices in the illustration shows compression? 

*Please see the attached image*

At 30°C, the area of a sheet of aluminum is 70 cm2 and the coefficient of linear expansion is 24 x 10-6°C . Determine the final temperature if the final area is 147.2 cm2 .