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NEETChemistryThermodynamics (C)

What is the purpose of measuring heat change at constant pressure?

Options

  1. ATo calculate the heat capacity of the calorimeter
  2. BTo determine the heat evolved or absorbed during a reaction
  3. CTo maintain a controlled temperature inside the calorimeter
  4. DTo measure the change in volume of the reactants

Correct answer

B. To determine the heat evolved or absorbed during a reaction

Step-by-step solution

Measuring heat change at constant pressure allows us to determine the heat evolved or absorbed during a chemical reaction, which is often referred to as the enthalpy change (∆rH).

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