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Our primary objective in thermodynamics is to explain the bulk behavior of matter. … As much as I've read on the internet, statistical thermodynamics solves these problems. However, I do not understand how it does so. …

The microscopic viewpoint of studying a system in thermodynamics is the one in which we consider the system on a molecular/atomic/sub-atomic level. (is that even right?) …

I can't understand how a large cavity maintained at a constant inner surface temperature T, with a small opening on its surface behaves like a black body. How is it a perfect emitter and a perfect abs …

When studying thermodynamics we come across a property of a system called internal energy, which is the sum of all energies possessed by the system at the microscopic level. …

If the number of constituents is small we need to go with statistical thermodynamics. … What exactly goes wrong with a small number of particles that we have to resort to statistical thermodynamics? …

Thermodynamics studies matter from a macroscopic viewpoint. We describe matter using macroscopic quantities such as pressure, volume, density, mass, etc. …

I'm studying heat transfer at graduate level, and in the process of deriving LMTD of a heat exchanger, the book took the following assumption : Any axial heat conduction will be neglected. What that t …

Please excuse me, for any inability in my way to frame the question. I myself had a hard time making myself understand what was the doubt I really had :P. Also, I'm studying heat transfer at Undergrad …

Consider two identical piston cylinder arrangements, inside which we have the same gas. Sand grains are present over the piston in both the cases, and the initial state of the system (the gas) is same …

I read that a blackbody at a temperature T, would emit thermal energy in the form of Electromagnetic waves. This thermal energy emitted per unit the area per unit time is called blackbody emissive pow …

This question stems from the accepted answer to this question Classical thermodynamics deals with and relates macroscopic quantities, like pressure, temperature, mass, volume, etc. … Even though I was assisted in the linked question, that internal energy is defined by first law of thermodynamics, I don't get how? …

The derivation of Log Mean Temperature Difference (LMTD) for a Heat exchanger at preliminary level makes some assumptions like, constant specific heats, steady state operation, no changes in kinetic a …

I was reading about heat conduction in solids wherein it was stated that in crystalline solids heat conduction takes place via lattice vibrations. In relation to this, the word phonon was used. In rad …

Imagine having a rectangular block. If the heat transfer is predominant in only one direction (say x) and the heat transfer in the other two directions (say y and z) is negligible, then can I conclude …

Consider a flat plate at a higher temperature than the fluid which is flowing over it, with some velocity. Forced convection is taking place. I'm convinced that the value of heat transfer coefficient …