CHEM 111 Lecture Notes - Lecture 18: Thermometer
21 Dec 2015
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Chem111 lecture 18 applications to calorimetry. Review question: in an ____ reaction, heat is transferred to the surroundings, ____ bonded molecules are converted to ____ bonded molecules: answer: exothermic, strongly, weakly. Review question: is h positive of negative for an exothermic reaction: answer: it is negative. The temperature changes from 25. 00 to 33. 20 oc. Solve for deltah in kj/mol if the specific heat capacity is. The enthalpy change for a chemical reaction can be expressed as the sum of two or more chemical reactions, is equal to the sum of the enthalpy changes for the individual reactions. Enthalpy is a state function: value only depends on the state of the system, not on its history. So a hrxn does not depend on the route from reactants to products. Analogy: change in potential energy from here to domino"s pizza does not depend on how you get there.
