Why does iron have molar specific heat greater than Debye value 3R?
Specific temperature known as Debye temperature. The saturation value is approximately equal to 3R.
Heat capacity increases with temperature and reaches a limiting value of 3R =25 JK-1mol-1, where R is the gas constant
Most solid materials expand upon heating and contract when cooled. The parameter is called the linear coefficient of thermal expansion; it is a material property that is indicative of the extent to which a material expands upon heating, and has units of reciprocal temperature [(0C)-1 or (0F)-1]. If a very deep energy trough caused by strong atomic bonding is characteristic of the material, the atoms separate to a lesser and the material has low linear coefficient of thermal expansion. This relationship also suggests that materials having a high melting temperature – also due to strong atomic bonds – have low thermal expansion coefficients.
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