Which of the following is not a state function
(1) Internal energy
(2) Enthalpy
(3) Work
(4) Entropy
Among them, intensive property is [AFMC 2004]
1. Mass
2. Volume
3. Surface tension
4. Enthalpy
The first law of thermodynamics is a statement of:
1. Conservation of mass
2. Conservation of linear momentum
3. Conservation of energy
4. Conservation of angular momentum
A mixture of two moles of carbon monoxide and one mole of oxygen, in a closed vessel is ignited to convert the carbon monoxide to carbon dioxide. If ΔH is the enthalpy change and ΔE is the change in internal energy, then
(1) ΔH > ΔE
(2) ΔH < ΔE
(3) ΔH = ΔE
(4) The relationship depends on the capacity of the vessel
The relation between ΔE and ΔH is [MP PET 1992; MP PMT 1996; MP PET/PMT 1998]
1.
2.
3.
4.
At constant T and P, which one of the following statements is correct for the reaction,
(1) ΔH is independent of the physical state of the reactants of that compound
(2) ΔH > ΔE
(3) ΔH < ΔE
(4) ΔH = ΔE
For the reaction of one mole of zinc dust with one mole of sulphuric acid in a bomb calorimeter, ΔU and w correspond to
(1)
(2)
(3)
(4)
If ΔH is the change in enthalpy and ΔE the change in internal energy accompanying a gaseous reaction
(1) ΔH is always greater than ΔE
(2) ΔH < ΔE only if the number of moles of the products is greater than the number of the reactants
(3) ΔH is always less than ΔE
(4) ΔH < ΔE only if the number of moles of the products is less than the number of moles of the reactants
Enthalpy for the reaction C + O2 → CO2 is-
1. Positive
2. Negative
3. Zero
4. None
The work done in ergs for the reversible expansion of one mole of an ideal gas from a volume of 10 liters to 20 liters at 25°C is -
1.
2.
3.
4.