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⚡ Enter ArenaIf heat capacity increases linearly with temperature, what adjustment accounts for this in determining enthalpy change using Kirchhoff's Law?
A)Use heat capacity at initial temperature
B)Use heat capacity at final temperature
C)Ignore temperature dependence completely
D)Integrate heat capacity over temperature range✓
💡 Explanation
Kirchhoff's Law dictates how enthalpy changes with temperature. When heat capacity varies with temperature, the integral of the heat capacity equation over the temperature range determines the accurate enthalpy change, because simple multiplication of heat capacity and temperature difference becomes insufficient; therefore, integrating accounts for the continuous change in heat capacity rather than relying on single-point values.
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