量热器的内筒为什么要用金属去做?有些资料介绍,用保温杯来代替量热器作测量比热的实验。量热器的内筒是用金属做好还是用玻璃做好呢?回答是肯定的:应当用金属来作量热器的内筒,而不应当用玻璃(如保温杯之类)来做量热器的内筒.理由有下面四点.第一、一个好的量热器,应从结构上保证热交换只是在系统内进行.尽量减少量热器由于传导、对流、辐射等方式向外界散发热量.为了达到这一目的,量热器的外筒采用热的不良导体——瓷器去做;内筒用木架垫起,使内、外筒间保留一些空气作为隔热层;在筒的上面 Why do the inner cylinder calorimeter to do with metal? Some information on the use of thermos cups instead of calorimeters for the measurement of specific heat experiments. The inner cylinder of the calorimeter is made of metal or glass? The answer is yes: the inner cylinder of the calorimeter should be made of metal rather than glass (such as a thermos cup) First, a good calorimeter, from the structure to ensure that heat exchange is only carried out in the system. To minimize the calorimeter due to conduction, convection, radiation, etc. to the outside world Heat.To achieve this goal, the calorimeter outer cylinder using poor heat conductor - porcelain to do; the inner cylinder with a wooden pad, so that the inner and outer cylinder to keep some air as the insulation layer; in the tube Above