(1)When the volumetric flow rate of cold fluid keeps constant, changing the volumetric flow rate of hot fluid, how will

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(1)When the volumetric flow rate of cold fluid keeps constant,
changing the volumetric flow rate of hot fluid, how will the Q and
K change?
(2)Why in the industrial application, the absorption was carried
out at low T and high P, while the desorption was performed at high
T and low pressure?
(3)Please discuss the relations between
KYa and G and L。
(4)Can the feed plate arbitrarily chosen? Discuss how this feed
position affect the function of the distillation tower and how to
decide the feed plate？