Elite QandA


What is a dot in thermodynamics?


  1. What is a dot in thermodynamics?
  2. How do you calculate W in thermodynamics?
  3. What is J in mechanical equivalent of heat?
  4. What is value of J in thermodynamics?
  5. What is the value of J in heat?
  6. What is J in W JQ?
  7. Is Q the same as W?

What is a dot in thermodynamics?

It's a capital Q with a dot above representing "heat transfer per unit time" (or rate of heat transfer). Similar thermodynamic symbols are Ẇ (rate of work produced) and ṁ (rate of mass transfer)...and interestingly these DO exist in Unicode.

How do you calculate W in thermodynamics?

Since the system has constant volume (ΔV=0) the term -PΔV=0 and work is equal to zero. Thus, in the equation ΔU=q+w w=0 and ΔU=q. The internal energy is equal to the heat of the system....Introduction.ProcessSign of heat (q)Sign of Work (w)Heat released from the system- exothermic (absorbed by surroundings)-N/A•Aug 15, 2020

What is J in mechanical equivalent of heat?

mechanical equivalent of heat. noun. physics a factor for converting units of energy into heat units. It has the value 4.1868 joules per calorieSymbol: J. J.

What is value of J in thermodynamics?

J is the Joule's constant. U is the internal energy of the system. For any process, the heat supplied to the system is either used to give some work output or is used to increase the internal energy of the system. Which is the first law of thermodynamics.

What is the value of J in heat?

Though a standardised value of 4.1860 J·cal−1 was established in the early 20th century, in the 1920s, it was ultimately realised that the constant is simply the specific heat of water, a quantity that varies with temperature between the values of 4.17 and 4.22 J·g−1·°C−1.

What is J in W JQ?

This is Joule's law and J is called mechanical equivalent of heat. (1) From W = JQ if Q = 1 then J = W. Hence the amount of work done necessary to produce unit amount of heat is defined as the mechanical equivalent of heat.

Is Q the same as W?

Q=W when we consider SI units. So W=JQ is practically of no use but it forms the base for building the concepts.



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