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What does the term 'enthalpy' represent?

Practice Questions

Q1
What does the term 'enthalpy' represent?
  1. Internal energy plus pressure times volume
  2. Total energy of a system
  3. Heat content at constant pressure
  4. All of the above

Questions & Step-by-Step Solutions

What does the term 'enthalpy' represent?
  • Step 1: Understand that enthalpy is a concept in thermodynamics, which is the study of heat and energy.
  • Step 2: Know that enthalpy is represented by the symbol 'H'.
  • Step 3: Learn that enthalpy is calculated using the formula: H = U + PV, where 'U' is internal energy, 'P' is pressure, and 'V' is volume.
  • Step 4: Recognize that internal energy (U) is the energy contained within a system.
  • Step 5: Understand that the product of pressure (P) and volume (V) (i.e., PV) accounts for the work done by the system when it expands or contracts.
  • Step 6: Realize that enthalpy represents the total heat content of a system when the pressure is constant.
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