Which of the following statements is true? Entropy has the unit of (A) Heat (B) Work (C) Energy (D) Heat capacity (E) Temperatur
1 answer:
Answer:
D) Heat capacity
Explanation:
Entropy is defined as
Where
dS: is an infinitesimal amount of entropy
dQ: is an infinitesimal amount of heat
T: is the temperature in absolute units
The units of this are units of heat over units of temperature.
This is the same unit used by heat capacity
Do not confuse it with the specific heat capacity. Heat capacity is a property of a body and is an extensive property, while specific heat capacity (sometimes shortened to specific heat) is a property of material and is an intensive property.
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Answer:
the required diameter is 0.344 m
Explanation:
given data:
flow is laminar
flow of carbon dioxide Q = 0.005 Kg/s
for flow to be laminar, Reynold's number must be less than 2300 for pipe flow and it is given as
arrange above equation for diameter
\frac{\rho Q D}{\mu A }<2300
dynamic density of carbon dioxide = 1.47× Pa sec
density of carbon dioxide is 1.83 kg/m³
D = 0.344 m