{"id":470,"date":"2013-11-19T06:48:31","date_gmt":"2013-11-19T04:48:31","guid":{"rendered":"https:\/\/wissen.science-and-fun.de\/chemistry\/?page_id=470"},"modified":"2013-11-19T07:00:39","modified_gmt":"2013-11-19T05:00:39","slug":"470-2","status":"publish","type":"page","link":"https:\/\/wissen.science-and-fun.de\/chemistry\/chemistry\/470-2\/","title":{"rendered":"Stem correction for mercury thermometers"},"content":{"rendered":"
In general, a mercury thermometer is not completely in the room whose temperature is to be measured.\u00a0This allows faults to creep in the temperature measurement, but you can correct (especially if one is interested in an accurate temperature measurement).<\/div>\n
\n

The correction formula is as follows:\u00a0K\u00a0t<\/sub>\u00a0= n (tt ‘) f\u00a0g<\/sub><\/p>\n\n\n\n\n\n\n\n
T<\/sub>K<\/td>\nCorrection to the Kelvin temperature read: The value is added if the outside temperature is lower than that to be determined, in the opposite case, the value is subtracted.<\/td>\n<\/tr>\n
n<\/td>\nis out of the space (the temperature of which is to be measured) length of the outstanding mercury column, expressed in Kelvin<\/td>\n<\/tr>\n
t<\/td>\ntemperature reading in \u00b0 C<\/td>\n<\/tr>\n
t ‘<\/td>\nmean temperature of the mercury column in yarn \u00b0 C (can be determined using an auxiliary thermometer)<\/td>\n<\/tr>\n
fg<\/sub><\/td>\nCorrection factor which depends on the type and structure of the glass Thermomenters.\u00a0In the following table, an average factor of 0.00016 is included.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Table of correction values \u200b\u200bK\u00a0t:<\/sub><\/p>\n

 <\/p>\n<\/div>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
t-t\u2019in K<\/td>\nn in K<\/td>\n<\/tr>\n
20<\/td>\n40<\/td>\n60<\/td>\n80<\/td>\n100<\/td>\n120<\/td>\n140<\/td>\n160<\/td>\n180<\/td>\n200<\/td>\n220<\/td>\n240<\/td>\n260<\/td>\n280<\/td>\n300<\/td>\n<\/tr>\n
10<\/td>\n0,0<\/td>\n0,1<\/td>\n0,1<\/td>\n0,1<\/td>\n0,2<\/td>\n0,2<\/td>\n0,2<\/td>\n0,3<\/td>\n0,3<\/td>\n0,3<\/td>\n0,4<\/td>\n0,4<\/td>\n0,4<\/td>\n0,4<\/td>\n0,5<\/td>\n<\/tr>\n
20<\/td>\n0,1<\/td>\n0,1<\/td>\n0,2<\/td>\n0,3<\/td>\n0,3<\/td>\n0,4<\/td>\n0,4<\/td>\n0,5<\/td>\n0,6<\/td>\n0,6<\/td>\n0,7<\/td>\n0,8<\/td>\n0,8<\/td>\n0,9<\/td>\n1,0<\/td>\n<\/tr>\n
30<\/td>\n0,1<\/td>\n0,2<\/td>\n0,3<\/td>\n0,4<\/td>\n0,5<\/td>\n0,6<\/td>\n0,7<\/td>\n0,8<\/td>\n0,9<\/td>\n1,0<\/td>\n1,1<\/td>\n1,2<\/td>\n1,2<\/td>\n1,3<\/td>\n1,4<\/td>\n<\/tr>\n
40<\/td>\n0,1<\/td>\n0,3<\/td>\n0,4<\/td>\n0,5<\/td>\n0,6<\/td>\n0,78<\/td>\n0,9<\/td>\n1,0<\/td>\n1,2<\/td>\n1,3<\/td>\n1,4<\/td>\n1,5<\/td>\n1,7<\/td>\n1,8<\/td>\n1,9<\/td>\n<\/tr>\n
50<\/td>\n0,2<\/td>\n0,3<\/td>\n0,5<\/td>\n0,6<\/td>\n0,8<\/td>\n1,0<\/td>\n1,1<\/td>\n1,3<\/td>\n1,4<\/td>\n1,6<\/td>\n1,8<\/td>\n1,9<\/td>\n2,1<\/td>\n2,2<\/td>\n2,4<\/td>\n<\/tr>\n
60<\/td>\n0,2<\/td>\n0,4<\/td>\n0,6<\/td>\n0,8<\/td>\n1,0<\/td>\n1,2<\/td>\n1,3<\/td>\n1,5<\/td>\n1,7<\/td>\n1,9<\/td>\n2,1<\/td>\n2,3<\/td>\n2,5<\/td>\n2,7<\/td>\n2,9<\/td>\n<\/tr>\n
70<\/td>\n0,2<\/td>\n0,4<\/td>\n0,7<\/td>\n0,9<\/td>\n1,1<\/td>\n1,3<\/td>\n1,6<\/td>\n1,8<\/td>\n2,0<\/td>\n2,2<\/td>\n2,5<\/td>\n2,7<\/td>\n2,9<\/td>\n3,1<\/td>\n3,4<\/td>\n<\/tr>\n
80<\/td>\n0,3<\/td>\n0,5<\/td>\n0,8<\/td>\n1,0<\/td>\n1,3<\/td>\n1,5<\/td>\n1,8<\/td>\n2,0<\/td>\n2,3<\/td>\n2,6<\/td>\n2,8<\/td>\n3,1<\/td>\n3,3<\/td>\n3,6<\/td>\n3,8<\/td>\n<\/tr>\n
90<\/td>\n0,3<\/td>\n0,6<\/td>\n0,9<\/td>\n1,2<\/td>\n1,4<\/td>\n1,7<\/td>\n2,0<\/td>\n2,3<\/td>\n2,6<\/td>\n2,9<\/td>\n3,2<\/td>\n3,5<\/td>\n3,7<\/td>\n4,0<\/td>\n4,3<\/td>\n<\/tr>\n
100<\/td>\n0,3<\/td>\n0,6<\/td>\n1,0<\/td>\n1,3<\/td>\n1,6<\/td>\n1,9<\/td>\n2,2<\/td>\n2,6<\/td>\n2,9<\/td>\n3,2<\/td>\n3,5<\/td>\n3,8<\/td>\n4,2<\/td>\n4,5<\/td>\n4,8<\/td>\n<\/tr>\n
110<\/td>\n0,4<\/td>\n0,7<\/td>\n1,1<\/td>\n1,4<\/td>\n1,8<\/td>\n2,1<\/td>\n2,5<\/td>\n2,8<\/td>\n3,2<\/td>\n3,5<\/td>\n3,8<\/td>\n4,2<\/td>\n4,6<\/td>\n4,9<\/td>\n5,3<\/td>\n<\/tr>\n
120<\/td>\n0,4<\/td>\n0,8<\/td>\n1,2<\/td>\n1,5<\/td>\n1,9<\/td>\n2,3<\/td>\n2,7<\/td>\n3,1<\/td>\n3,5<\/td>\n3,8<\/td>\n4,2<\/td>\n4,6<\/td>\n5,0<\/td>\n5,4<\/td>\n5,8<\/td>\n<\/tr>\n
130<\/td>\n0,4<\/td>\n0,8<\/td>\n1,2<\/td>\n1,7<\/td>\n2,1<\/td>\n2,5<\/td>\n2,9<\/td>\n3,3<\/td>\n3,7<\/td>\n4,2<\/td>\n4,6<\/td>\n5,0<\/td>\n5,4<\/td>\n5,8<\/td>\n6,2<\/td>\n<\/tr>\n
140<\/td>\n0,4<\/td>\n0,9<\/td>\n1,3<\/td>\n1,8<\/td>\n2,2<\/td>\n2,7<\/td>\n3,1<\/td>\n3,6<\/td>\n4,0<\/td>\n4,5<\/td>\n4,9<\/td>\n5,4<\/td>\n5,8<\/td>\n6,3<\/td>\n6,7<\/td>\n<\/tr>\n
150<\/td>\n0,5<\/td>\n1,0<\/td>\n1,4<\/td>\n1,9<\/td>\n2,4<\/td>\n2,9<\/td>\n3,3<\/td>\n3,8<\/td>\n4,3<\/td>\n4,8<\/td>\n5,3<\/td>\n5,8<\/td>\n6,2<\/td>\n6,7<\/td>\n7,2<\/td>\n<\/tr>\n
160<\/td>\n0,5<\/td>\n1,0<\/td>\n1,5<\/td>\n2,0<\/td>\n2,6<\/td>\n3,1<\/td>\n3,6<\/td>\n4,1<\/td>\n4,6<\/td>\n5,1<\/td>\n5,6<\/td>\n6,1<\/td>\n6,7<\/td>\n7,2<\/td>\n7,7<\/td>\n<\/tr>\n
170<\/td>\n0,5<\/td>\n1,1<\/td>\n1,6<\/td>\n2,2<\/td>\n2,7<\/td>\n3,3<\/td>\n3,8<\/td>\n4,4<\/td>\n4,9<\/td>\n5,4<\/td>\n6,0<\/td>\n6,5<\/td>\n7,1<\/td>\n7,6<\/td>\n8,2<\/td>\n<\/tr>\n
180<\/td>\n0,6<\/td>\n1,2<\/td>\n1,7<\/td>\n2,3<\/td>\n2,9<\/td>\n3,5<\/td>\n4,0<\/td>\n4,6<\/td>\n5,2<\/td>\n5,8<\/td>\n6,3<\/td>\n6,9<\/td>\n7,5<\/td>\n8,1<\/td>\n8,6<\/td>\n<\/tr>\n
190<\/td>\n0,6<\/td>\n1,2<\/td>\n1,8<\/td>\n2,4<\/td>\n3,0<\/td>\n3,6<\/td>\n4,3<\/td>\n4,9<\/td>\n5,5<\/td>\n6,1<\/td>\n6,7<\/td>\n7,3<\/td>\n7,9<\/td>\n8,5<\/td>\n9,1<\/td>\n<\/tr>\n
200<\/td>\n0,6<\/td>\n1,3<\/td>\n1,9<\/td>\n2,6<\/td>\n3,2<\/td>\n3,8<\/td>\n4,5<\/td>\n5,1<\/td>\n5,8<\/td>\n6,4<\/td>\n7,0<\/td>\n7,7<\/td>\n8,3<\/td>\n9,0<\/td>\n9,6<\/td>\n<\/tr>\n
220<\/td>\n0,7<\/td>\n1,4<\/td>\n2,1<\/td>\n2,8<\/td>\n3,5<\/td>\n4,2<\/td>\n4,9<\/td>\n5,6<\/td>\n6,3<\/td>\n7,0<\/td>\n7,7<\/td>\n8,4<\/td>\n9,1<\/td>\n9,9<\/td>\n10,6<\/td>\n<\/tr>\n
240<\/td>\n0,8<\/td>\n1,5<\/td>\n2,3<\/td>\n3,1<\/td>\n3,8<\/td>\n4,6<\/td>\n5,4<\/td>\n6,1<\/td>\n6,9<\/td>\n7,7<\/td>\n8,4<\/td>\n9,2<\/td>\n10,0<\/td>\n10,8<\/td>\n11,5<\/td>\n<\/tr>\n
260<\/td>\n0,8<\/td>\n1,7<\/td>\n2,5<\/td>\n3,3<\/td>\n4,2<\/td>\n5,0<\/td>\n5,8<\/td>\n6,6<\/td>\n7,5<\/td>\n8,3<\/td>\n9,2<\/td>\n10,0<\/td>\n10,8<\/td>\n11,6<\/td>\n12,5<\/td>\n<\/tr>\n
280<\/td>\n0,9<\/td>\n1,8<\/td>\n2,7<\/td>\n3,6<\/td>\n4,5<\/td>\n5,4<\/td>\n6,3<\/td>\n7,2<\/td>\n8,1<\/td>\n9,0<\/td>\n9,9<\/td>\n10,8<\/td>\n11,6<\/td>\n12,5<\/td>\n13,4<\/td>\n<\/tr>\n
300<\/td>\n1,0<\/td>\n1,9<\/td>\n2,9<\/td>\n3,8<\/td>\n4,8<\/td>\n5,8<\/td>\n6,7<\/td>\n7,7<\/td>\n8,6<\/td>\n9,6<\/td>\n10,6<\/td>\n11,5<\/td>\n12,5<\/td>\n13,4<\/td>\n14,4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

In general, a mercury thermometer is not completely in the room whose temperature is to be measured.\u00a0This allows faults to creep in the temperature measurement, but you can correct (especially if one is interested in an accurate temperature measurement). The correction formula is as follows:\u00a0K\u00a0t\u00a0= n (tt ‘) f\u00a0g TK Correction to the Kelvin temperature … <\/p>\n

Continue reading<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":34,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":{"wprm-recipe-roundup-name":"","wprm-recipe-roundup-description":"","jetpack_post_was_ever_published":false,"footnotes":""},"class_list":["post-470","page","type-page","status-publish","hentry","nodate","item-wrap"],"yoast_head":"\nStem correction for mercury thermometers - Steffen's Chemistry Pages<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/wissen.science-and-fun.de\/chemistry\/chemistry\/470-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Stem correction for mercury thermometers - Steffen's Chemistry Pages\" \/>\n<meta property=\"og:description\" content=\"In general, a mercury thermometer is not completely in the room whose temperature is to be measured.\u00a0This allows faults to creep in the temperature measurement, but you can correct (especially if one is interested in an accurate temperature measurement). 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