Ammonia is used in liquid form for a process and is needed at a temperature of 15°c. it is available at 0°c. liquid carbon dioxide is used rather than water as a heat source (using water may lead to trouble). liquid carbon dioxide is available at 5°c and a mass flow rate of 1.25 kg/s. a 15-m-long double pipe heat exchanger, made of 21/2 x 11/4 type k copper tubing, is available for this service. for an ammonia flow rate of 1.2 kg/s, calculate outlet temperatures and pressure drops. will this setup work?

explanation:

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the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true?

a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of

5

9

degree celsius.

a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.

a temperature increase of

5

9

degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.

a) i only

b) ii only

c) iii only

d) i and ii only

answer: a

a is the answer