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Physics

Data:
mass =10 g
quantity of heat supplied =120 J
rise in temperature = 10 °C

Statement A : The heat capacity of the substance is 12 J/g.

Statement B : The specific heat capacity of the substance is 1.2 J/gK.

  1. Only statement A is correct.
  2. Only statement B is correct.
  3. Both statements A and B are correct.
  4. Both statements A and B are incorrect.

Calorimetry

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Answer

Only statement B is correct.

Explanation :

Given,
Mass (m) = 10 g
Heat supplied (Q) = 120 J
Temperature rise (ΔT) = 10 °C = 10 K

Statement A is incorrect:
Heat capacity of the sample (C) = QΔT\dfrac{\text{Q}}{\text{ΔT}}= 120J10K=12\dfrac{120 \text{J}} {10 \text{K}} = 12 J/K
Here, numerical value is correct but unit of heat capacity is wrong in statement A.

Statement B is correct:
Specific heat capacity (c) = Qm.ΔT\dfrac{\text{Q}}{\text{m.ΔT}} =120 J10g ×10 K\dfrac{\text{120 J}}{\text{10g }\times\text {10 K}} = 1.2 J/g K

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