At critical point enthalpy of vaporizations is
A carnot engine is made to work on amonoatomic gas first (g = 1.67) and then on adia atomic gas (g = 1.4). Among the two whichwill have better efficiency
Two carnot engine are in series operatingbetween source temperature of 180º C and 20ºCsink temperature. If both produce equal amountof work the intermediated temperature is.
Which law of thermodynamics predicts the degree of completion of chemical reactions.
Entropy of the universe
Isentropic flow is always
1. zero increase in entropy flow.
2. revertrible adiabatic flow.
3. Frictionless reversible flow.
In fluid dynamics, an isentropic flow is a fluid flow that is both adiabatic and reversible. That is, no heat is added to the flow, and no energy transformations occur due to friction or dissipative effects. For an isentropic flow, entropy density can vary between different streamlines.
If the entropy of a system increases it means.
The energy of an isolated system is
Joule thomson coefficient is the slope of constantenthalpy lines in
With increase of pressure latent heat of steam
For a pure substance, the degree of freedom forsaturated vapour and superheated vapour are
At tripple point of water which of the followingcan be found.
The term which can differentiate thermodynamics from other sciences is ____.
When water is heated from 0º C its specificvolume will,
Which of the following is a pure substance
i. Gaseous combustion product
ii. Dry air
iii. Moist Air
During boiling vapour pressure is _______ toatmospheric pressure.
Change of state ex. freezing, melting, evaporationetc. are
First law of thermodynamics provides
A vessel of volume 1m3 contains oxygen(molecular weight = 32) at P = 1 bar and T = 47º C. The mass of oxygen in vessel is [R = 8314 J/mol-k]
As temperature increases values of Cp, Cv and g for polyatomic gas
For a free expansion process work done is
The heat transfer in a polytropic process can be given as.
The cyclic integral of (dQ - dw) is
The unit of temperature in S.I. units is
Which of the following is an extensive property.