a) How do you call the technique used to determine the heat gained or lost by a substance during a chemical or physical change that  is based on the law of conservation of energy in an isolated system at constant presure and/or volume? b) Heat is _____ (added or released) to/by the solid at the melting point and remains constant until all of the solid melts.

Introductory Chemistry: An Active Learning Approach
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Chapter2: Matter And Energy
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a) How do you call the technique used to determine the heat gained or lost by a substance during a chemical or physical change that  is based on the law of conservation of energy in an isolated system at constant presure and/or volume?

b) Heat is _____ (added or released) to/by the solid at the melting point and remains constant until all of the solid melts.

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