Select the correct answer.
A car moves with an average speed of 45 miles/hour. How long does the car take to travel 90 miles?
А.
2 minutes
OB.
2 hours
OC.
45 minutes
OD
45 hours
E
90 minutes

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.