In contrast to inorganic compounds, the molecular attraction of organic compounds is weak, so organic compounds are usually volatile and possess low melting points.
【判断题】A simple design for heat transfer is found in a double-pipe heat exchanger. A double-pipe exchanger has a pipe inside a pipe. The outside pipe provides the tube, and the inner pipe provides the shell.
【简答题】A design for heat transfer is found in a heat exchanger. A double-pipe exchanger has a pipe inside a pipe. The outside pipe provides the , and the inner pipe provides the .