CHEM 1405 DAY 4.pdf - Heat us Temperature HEAT is the sasrgy transferred from hotter objects tocooler objects TEMP is the ang.k energy of

CHEM 1405 DAY 4.pdf - Heat us Temperature HEAT is the...

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Heat us Temperature HEAT is the sasrgy transferred from hotter objects tocooler objects TEMP is the ang.k energy of atoms/molecules that make an obj. heat nuqis often measured in calories or pulls one calorie (cal)= ant ofheat reg. to change temp of 19 of H2O toloc a calorie = 4 184 jouers a food calorie ( çal)is actually a kilocalorie Chapter 2 Atoms : the Great idea to start) Leucippus & Democritus, ~ 450 BC Atomos = the point which matter can no longerbe subdivided Aristotle, ~384 BC - "all matter is composed of 4 elements, andEusry thing is not atomsbutcont." Lausisisi - Sauly 1700 - law of conservation of mass in a chemical reaction, matter is neither created or destroyed • Proust - 1799 - law of definite proportions compounds always contain the same Loans in cartain definite proportions >regardlass of the source, Cul alwayshas the same proportons John Dalton - 1803 - law of multiple proportions: LmNs may combine in more than one set of proportions,wheach set corresponding to adiff compound atomic theory in 4 parts: all matter iscomposed ofv.omall particles called atoms
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