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Specific heat is the amount of thermal energy required to increase/ decrease the temperature of a unit mass of a substance by 1K This definition makes sense to me and is straightforward, however the s …

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 …

Consider a gas that goes from a state 1 ($P_1, V_1, T_1$) to state 2 ($P_2, V_2, T_2$) by a process path A during which energy was transferred by heat (say 20kJ). The heat transfer to the gas will be …

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 …

Consider a room with air and an electric heater inside. I want to determine what will be the temperature of the air in the room after 1 hour of starting the heater (whose power rating is known). The w …

Consider we wanted to analyze how long will it take for the coffee kept in a cup on a table, to cool down to room temperature. For this analysis, we can consider coffee as our system. Neglecting any m …

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. …

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? …

I was reading Fundamentals of Engineering Thermodynamics by Moran and others and in the discussion of open and closed systems I found this - In subsequent sections of this book, we perform thermodynamic …

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 …

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?) …

Consider a double pipe parallel flow heat exchanger. For such a heat exchanger the LMTD is given as $$\Delta T _{LM}= \frac{\Delta T_i-\Delta T_e}{ln(\frac{\Delta T_i}{\Delta T_e})} $$ The relation ab …

Consider a counter flow double pipe heat exchanger inside which the cold fluid enters at 20 degrees Celsius and hot fluid enters at 100 degrees Celsius. Initially the length of the heat exchanger is L …

Consider a large hollow enclosure, the inner surface of which is kept at a temperature T. If we consider any imaginary differential surface area $dA$ inside the enclosure, will the irradiation remain …

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 …