![\"Absolute](\"\/physics\/wp-content\/uploads\/sites\/2\/2015\/06\/Absolute-zero.jpg\")
\n<\/span><\/p>\n
Theory:<\/span><\/p>\n In a gas thermometer, pressure varies linearly with tempurature <\/p>\n Procedure:<\/span><\/p>\n Fill gas thermometer with air by opening the valve all the way, <\/p>\n Location:<\/span><\/p>\n All thermo lab supplies are located in L35, sections G and H. <\/p>\n <\/p>\n <\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" Theory: In a gas thermometer, pressure varies linearly with tempurature (at fixed volume), and is given by P=aT+b, in degrees celsius. One can determine the value of absolute zero by calibrating the gas thermometer at non-extreme temperatures and extrapolating the calibration curve to the point of zero pressure (and hence zero temperature). Procedure: … Continue reading Absolute Zero<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":4888,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[81,134,274,299,399,492],"_links":{"self":[{"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/posts\/3710"}],"collection":[{"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/comments?post=3710"}],"version-history":[{"count":1,"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/posts\/3710\/revisions"}],"predecessor-version":[{"id":5440,"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/posts\/3710\/revisions\/5440"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/media\/4888"}],"wp:attachment":[{"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/media?parent=3710"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/categories?post=3710"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/tags?post=3710"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n(at fixed volume), and is given by P=aT+b, in degrees celsius. One can determine
\nthe value of absolute zero by calibrating the gas thermometer at non-extreme
\ntemperatures and extrapolating the calibration curve to the point of zero pressure
\n(and hence zero temperature). <\/span><\/p>\n
\nthen close the valve tightly to seal the bulb. Place the bulb of the gas thermometer
\ninto a water bath of known temperature and record pressure and temperature.
\nRepeat procedure with at least one more bath of a different temperature. Plot
\ndata, and extrapolate to zero pressure to determine abs zero. To test accuracy
\nof calibration curve, use gas thermometer to determine temperature of LN2. Should
\nget something close to -196 degrees Celsius. (However, oxygen will liquify,
\ncausing P vs T curve to become non-linear. So, may not get exactly -196.)<\/span><\/p>\n
\nSaftey glasses are in section C1.<\/span><\/p>\n