![]() Specific heat depends on the inner character of a material and is specific to a material.Įntropy opposite to specific heat is an extensive property. As entropy changes with the size of the system hence it is an extensive property.Ī substance cannot increase its temperature until it has met the energy demand of its molecules. The specific heat of 1 gram copper is the same as 1 kg copper. It is the heat required to raise the temperature of 1 gram mass by 1 degc. ![]() Its magnitude does not depend upon the amount of matter present in the system. As a reminder, QUANTITY DOES MATTER when describing an extensive attribute of a substance. The amount of heat needed to raise a substance's temperature by one degree Celsius in one gram, is also known as specific heat.Īs a result, the specific heat is more precise when referring to the mass of a substance that equals 1 gram. The amount of heat energy needed to increase the temperature of a given quantity of matter by one degree Celsius is referred to as heat capacity. specific heat.Ĭomparing extensive and intensive properties Let me first clarify a major misunderstanding regarding heat capacity vs. However, they do not convey the same meaning. Entropy occurs when a substance loses its kinetic energy.īoth specific heat and entropy have SI units of Jkg1K1. Specific heat is created when a substance gains this kinetic energy. The kinetic energy per unit mass per unit kelvin KJ/kg/k is what entropy and specific heat tell us. ![]() Like always, the answers to the challenging questions are straightforward. One reason is that not all of your questions can be answered on the internet. I had to think about this difficult subject for a while. I used to be confused as to why entropy and specific heat have same SI units of KJ/kg/K. I will define heat capacity as the Q/dt energy every time a substance gains when Q amount of heat is added to a heat reservoir at constant volume thereby removing the effect volume. That it is purely the effect of KE and not volume. I will define entropy as a loss of energy Q/T every time a heat reservoir adds Q amount of heat at constant volume. ![]() The reason they have the same unit yet are different is explained in this post. Even though entropy and specific heat have the same unit of expression (KJ/kg/k), they are not the same thing. ![]()
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