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Concepts Of Physics MCQ Edition [Volume 2]PhysicsCalorimetry

For a given body, the ratio of its specific heat capacity to its molar heat capacity:

Options

  1. Ais a dimensionless quantity
  2. Bis a universal constant
  3. Cis dependent on the mass of the body
  4. Dis dependent on the molecular weight of the body

Correct answer

D. is dependent on the molecular weight of the body

Step-by-step solution

Specific heat capacity s is the amount of heat required to raise the temperature of unit mass of a substance by 1^ C . s = Q m T Molar heat capacity C_m is the amount of heat required to raise the temperature of one mole of a substance by 1^ C . C_m = Q n T Taking the ratio of specific heat capacity to molar heat capacity: s C_m = Q m T Q n T = n m The number of moles n is given by n = m M , where m is the mass and M is the molecular weight of the body. s C_m = m M m = 1 M Thus, the ratio of specific heat capacity

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