Calculate the value of h2-h1 for superheated steam between the two states p2=100 bar, t2=320 ºc and p1=100 bar and t1= 650 ºc.

a) compare your answer with the value from the steam tables, which is -961.2 j/g.
b) calculate the value of gr for one mole of water at 100 bar at both 320 ºc and 650 ºc.
c) compare your answer to the value of g obtained from the steam tables.
d) calculate the fugacity of the water vapor in the two states.

Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates

Which of the following is not a means to accelerating? question 4 options: a)increase speed b)remain still c)decrease speed d)change direction

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.