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7 March, 03:05

Which statement is FALSE?

a. ΔErxn is a measure of heat.

b. Enthalpy is the sum of a system's internal energy and the product of pressure and volume.

c. ΔHrxn is the heat of reaction.

d. An exothermic reaction gives heat off heat to the surroundings.

e. Endothermic has a positive ΔH.

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Answers (1)
  1. 7 March, 03:25
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    The false statement is a. ΔErxn is a measure of heat.

    Explanation:

    ΔErxn represents the energy change in a chemical reaction. However, in real processes the energy change is not only a measure of heat but also other forms like work and potential and kinetic energy.

    Enthalpy is actually defined like the sum of a system's internal energy and the product of pressure and volume, so b is correct.

    ΔHrxn is also the heat of reaction, which is also true

    The last ones are also true
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