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It can be shown that for simple compressible substance, the relationship  exists where, Cp & Cv are specific heats at constant pressure and constant volume respectively. T is temperature, Vis volume and Pis pressure. Which one of the following statements is NOT true?
  • a)
    Cp is always greater than Cv
  • b)
    The right side of the equation reduces to R for an ideal gas
  • c)
    Since can be either positive or negative, and must be positive , T must have a sign that is opposite to that of 
  • d)
    Cp is very equal to Cfor liquid water
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
It can be shown that for simple compressible substance, the relationsh...

Since  is always positive and for any substance is negative (C- Cv) Is always positive. Therefore Cp is always greater then Cv. When = 0 (for water at 4°C when density is maximum or specific volume minimum), Cp - Cv
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It can be shown that for simple compressible substance, the relationshipexists where, Cp & Cv are specific heats at constant pressure and constant volume respectively. T is temperature, Vis volume and Pis pressure. Which one of the following statements is NOT true?a)Cp is always greater than Cvb)The right side of the equation reduces to Rfor an ideal gasc)Sincecan be either positive ornegative, andmust be positive , T must have a sign that is opposite to that ofd)Cp is very equal to Cvfor liquid waterCorrect answer is option 'C'. Can you explain this answer? for Mechanical Engineering 2025 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about It can be shown that for simple compressible substance, the relationshipexists where, Cp & Cv are specific heats at constant pressure and constant volume respectively. T is temperature, Vis volume and Pis pressure. Which one of the following statements is NOT true?a)Cp is always greater than Cvb)The right side of the equation reduces to Rfor an ideal gasc)Sincecan be either positive ornegative, andmust be positive , T must have a sign that is opposite to that ofd)Cp is very equal to Cvfor liquid waterCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for It can be shown that for simple compressible substance, the relationshipexists where, Cp & Cv are specific heats at constant pressure and constant volume respectively. T is temperature, Vis volume and Pis pressure. Which one of the following statements is NOT true?a)Cp is always greater than Cvb)The right side of the equation reduces to Rfor an ideal gasc)Sincecan be either positive ornegative, andmust be positive , T must have a sign that is opposite to that ofd)Cp is very equal to Cvfor liquid waterCorrect answer is option 'C'. Can you explain this answer?.
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