MDCAT Biology MCQ #649

During a laboratory experiment, a student measures the energy required to convert 1kg of liquid water into gas. Which PTB value matches this?

MDCAT Biology MCQ #649

  1. Question 1

    Q1. During a laboratory experiment, a student measures the energy required to convert 1kg of liquid water into gas. Which PTB value matches this?

    • A) 540 kcal/kg
    • B) 580 kcal/kg
    • C) 564 kcal/kg
    • D) 574 kcal/kg

    Answer: 574 kcal/kg

    Explanation: PTB specifies water's heat of vaporization as 574 kcal/kg. 540 kcal/kg is a general value not used in the PTB textbook.