Astream of ammonia is cooled from 100°c to 20°c at a rate of 1800 kg/hr in the tube side of a double-pipe counter-flow heat exchanger. water enters the heat exchanger at 10°c at a rate of 2500 kg/hr. the outside diameter of the inner tube is 3 cm and the length of the pipe is 7m. using the log-mean temperature difference, calculate the overall heat transfer coefficient (u) for the heat exchanger. 2. a. determine the heat transfer rate between the two fluids b. determine the outlet temperature of the water. c. determine the heat transfer surface area. d. determine the log-mean temperature difference. e. determine the heat transfer coefficient for the heat exchanger. cp for ammonia is 5234j/kgk and cp for water is 4180j/kgk.