Specific heat experimental instrument

Abstract

A specific heat experimental instrument is characterized by comprising two test tubes, a support and thermometers. The two test tubes are respectively filled with water and fine sand; the two test tubes are hung in the air and are fixed abreast by the support; the thermometers are respectively inserted in the two test tubes; the support is an iron support; and the two test tubes are trussed abreast with ropes, metal wires or tapes and then clamped an iron ring of the iron support. The specific heat experimental instrument has the advantages that an additional alcohol lamp, the water and the fine sand are added, the water and the fine sand which have equal quality are filled in the two test tubes, then the test tubes are arranged abreast at the center of the flame of the same alcohol lamp and heated evenly, experiments are reliable and the success ratio is high; the temperature rises quickly, experiments can be completed within one to two minutes and the teaching arrangement is facilitated; and the ratio of temperature changing quantity of the water and the fine sand is obvious and approximates to the specific heat ratio of the water and the fine sand, and experiments are persuasive.

Description

[0001] technical field [0002] The invention relates to a middle school physics teaching appliance, in particular to a specific heat experiment instrument. [0003] Background technique [0004] In the existing specific heat experiment, two resistance wires of the same power are usually used to heat water or kerosene of equal mass, and the temperature rise of water and kerosene is compared through the measurement of a thermometer, which further shows that the specific heat of water and kerosene is different. The disadvantages are: heating for more than ten minutes, the temperature only rises by a few degrees, the process is slow, which is not conducive to the teaching arrangement; the contrast difference between the temperature change of water and kerosene is small, which is unconvincing; heating with resistance wire requires bulky low-voltage power supply, electric Plug boards and other equipment, as well as the troublesome operation of connecting wires, if two identical a...

AI Technical Summary

Problems solved by technology

The disadvantages are: heating for more than ten minutes, the temperature only rises by a few degrees, the process is slow, which is not conducive to the teaching arrangement; the contrast difference between the temperature change of water and kerosene is small, which is unconvincing; heating with resistance wire requires bulky low-voltage power supply, electric Plug boards and other equipment, as well as the troublesome operation of connecting wires, if two identical alcohol lamps are used for heating, it is difficult to adjust the flames of the alcohol lamps to be the same, and it is difficult to succeed in the experiment

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