The specific heat capacity of a substance is defined by:

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RRB ALP Electronics Mechanic 21 Jan 2019 Official Paper (Shift 3)
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  1. m(ΔQ/ΔT)
  2. m(ΔT/ΔQ)
  3. (1/m)(ΔQ/ΔT)
  4. (1/m)(ΔT/ΔQ)

Answer (Detailed Solution Below)

Option 3 : (1/m)(ΔQ/ΔT)
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Detailed Solution

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Concept:

Specific heat capacity:

  • It can be defined as the amount of heat required to change its temperature by one degree.
  • Mathematically, heat required, Q = mcΔT,
  • where m = mass, c = specific heat capacity, ΔT = temperature difference
  • The heat can be measured in Joule (J). 

Explanation:

The heat required, Q = mcΔT  

\(c=\frac{Q}{m\Delta T}\)

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