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Q. Internal energy is sum of

UP CPMTUP CPMT 2007

Solution:

Internal energy is the energy associated with every substance, depending on the chemical nature, temperature, pressure and volume. It is the sum of many types of energies such as translational energy, rotational energy, vibrational energy, electronic energy and bonding energy o f the molecule.
$U=U_{\text{trans}}+U_{\text{rot}}+U_{\text{vib}}+U_{\text{bonding}}+U_{\text{electronic}}$