Physical Laboratory Experiments For Engineering Students PDF Download

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 edition. Excerpt: ...holding the copper is released and the copper is then quickly lowered into the calorimeter. The mass of the calorimeter used is 126.5 grams and its specific heat is 0.094. The approximate volume of the immersed part of the calorimeter thermometer is 1 cu. cm., and the product of specific heat and density both for mercury and for glass is nearly 0.46. Therefore the water equivalent of the calorimeter and thermometer is k = 126.5 X 0.094 + 0.46 = 12.35 grams. Procedure. Weigh the bundle of copper scraps and then suspend it in the heating chamber. After partially filling the boiler with water, ignite the gas at the Bunsen burner beneath the boiler. Pass the issuing steam through the steam jacket and from there to a condensing vessel, meanwhile keeping the calorimeter protected from the heater by lowering the wooden shutter. When the temperature of the heater chamber has been constant for some minutes, pour about 250 grams of water into the calorimeter, the water, having a temperature approximately 3 C. below that of the room. Observe the temperature indicated by the thermometer located in the heater chamber, then measure the temperature of its exposed stem, and thereafter note the reading of the thermometer in the calorimeter, estimating tenths of divisions in each case. Immediately raise the shutter, slide the calorimeter under the heater, lower the bundle of copper scraps into the calorimeter quickly but without splashing any water, withdraw the calorimeter, lower the shutter, slowly agitate the water by raising and lowering the copper by its suspending thread, and note accurately the final temperature of the water. It will be observed that the final temperature is roughly as much above room temperature as the latter was above the...