关键词: 比热容, 电热法, 比值法, 牛顿冷却定律

Abstract: In the liquid specific heat capacity measurement experiment using the electric heating method, the Newton＇s law of cooling is usually used to correct the system heat dissipation problem.Through calculation and analysis of the system heat dissipation,a new measurement scheme is put forward to reduce the effects of the system heat dissi- pation on the test results.The system heat dissipation ratio of two different heating processes is used to measure the liquid specific heat capacity in the new method.Test results show that the measurement scheme has strong operability and high precision, which is suitable for popularization and promotion in the university physics experiment teaching.

Key words: specific heat, electrothermal process, ratio method, Newton＇s law of cooling