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Chemistry

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The phrase “the heat absorbed or released by a system undergoing a physical or chemical change at constant pressure” is

a. the change in enthalpy of the system.
b. the change in internal energy of the system.
c. the definition of a state function.
d. the temperature change of the system.
e. a statement of Hess’s law.

  • Chemistry -

    Can you explain why?

  • Chemistry -

    Here is some reading for you. Pay particular attention to paragraphs 4 and 5.
    http://en.wikipedia.org/wiki/Enthalpy

  • Chemistry -

    i want the answer dumb butt not a source

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