MDCAT Biology MCQ #887

A chemist measures the energy required to convert 1 kg of liquid water into vapor at boiling point. Which value represents the heat of vaporization?

MDCAT Biology MCQ #887

  1. Question 1

    Q1. A chemist measures the energy required to convert 1 kg of liquid water into vapor at boiling point. Which value represents the heat of vaporization?

    • A) 540 kcal/kg
    • B) 574 kcal/kg
    • C) 580 kcal/kg
    • D) 600 kcal/kg

    Answer: 574 kcal/kg

    Explanation: Water's heat of vaporization is 574 kcal/kg as per PTB; 540 kcal/kg is a standard value used in other non-PTB curricula.