If two objects are in thermal contact and one object is at a higher temperature than the other, then
a.
heat will flow from the cooler object to the warmer object, increasing the temperature difference between them.
b.
cold will flow from the cooler object to the warmer object until they reach the same temperature.
c.
cold will flow from the warmer object to the cooler object, increasing the temperature difference between them.
d.
heat will flow from the warmer object to the cooler object until they reach the same temperature.

Describe in detail the melting point behavior of the 80: 20 benzoic acid-mandelic acid mixture

Where are chemicals found at work? a. only in cleaning products b. only in carpets and paint c. in every area of work d. only in food preparation submit

In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask