What is the difference between a mixture and compound? a. a mixture is a liquid and a compound is a solid. b. a mixture is made of two or more elements and a compound is made of just one element. c. a compound is made of two or more different types of molecules, and a mixture is made of just one type of molecule. d. a mixture is made of two or more different types of molecules, and a compound is made of just one type of molecule.

8.29 two streams containing pyridine and acetic acid at 25°c are mixed and fed into a heat exchanger. due to the heat-of-mixing effect, it is desired to reduce the temperature after mixing to 25°c using a stream of chilled ethylene glycol as indicated in the diagram. calculate the mass flow rate of ethylene glycol needed. the heat capacity of ethylene glycol at these conditions is approximately 2.8 kj/(kg k), and the enthalpy change of mixing (δmixh) is given below.