Which is correct for an endothermic reaction?
ΔH is positive
ΔH is negative
ΔE is negative
ΔH = zero
The temperature of the system decreases in an
adiabatic compression
isothermal compression
isothermal expansion
adiabatic expansion
Minimum work is obtained when 1 kg of ____ gas expanded under 500 kPa to 200 kPa pressure at 0oC.
chlorine
oxygen
nitrogen
methane
For an endothermic reaction, energy of activation is Ea and enthalpy of the reaction is ΔH (both of these in KJ/mol). Minimum value of Ea will be
equal to zero
less than ΔH
equal to ΔH
more than ΔH
Thermodynamically the most stable form of carbon is
diamond
graphite
fullerenes
coal
Which is included in thermodynamic equilibrium from the following?
Pressure equilibrium
Chemical equilibrium
Thermo equilibrium
All of these
A process in which the system does not exchange heat with the surrounding is known as
isothermal
isobaric
isochoric
adiabatic
Which of the following is a path function?
Internal energy
Enthalpy
Work
Entropy
One mole of an ideal gas is initially at 0o C and 1 atm pressure. If it absorbs 1000 cal heat during a reversible isothermal expansion, what will be its final volume?
102.5L
242.5L
22.4L
121.25L
Which of the following is the correct option for free expansion of an ideal gas under adiabatic condition?
q = 0, ΔT < 0, w ≠ 0
q = 0, ΔT ≠ 0, w = 0
q ≠ 0, ΔT < 0, w = 0
q =0, ΔT = 0, w = 0
