Lecture 4-5 Work, Energy

L in the 1780s some believed that cold was a uid

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Unformatted text preview: tal expands, and gets bigger, that there was a weightless gas called “caloric” that passed through pores in liquids and solids l༆  The substance only went from hot objects to colder ones l༆  The substance was conserved and if you thought of it as a material substance you could do all of the calculaPons about heat transfer etc. l༆  In the 1780s, some believed that cold was a fluid, "frigoric” – Prevost said that cold was a lack of caloric…. l༆  We sPll use calories, even more than 150 years ader the theory was debunked. l༆  A calorie is the amount of heat required to raise the temperature of 1 gram of water by 1⁰ C Work and heat Interchange l༆  Count Rumford (1798) demonstrated that by doing mechanical ‘wo...
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