19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Thermodynamics is not concerned about____.
Closed system can exchange (with surroundings)
Which of the following quantities is not a state function?
The volume of gas is reduced to half from its original volume. The specific heat will____.
Thermodynamics deals with
Which of the following macroscopic variable is not measurable?
Which of the following reactions define o f G ? (a) diamond C O g CO g → (b) H g F g HF g → (c) H P O H O 2H PO → (d) SO g O g SO g →
Which of the following is a state function?
The state of a thermodynamic system is represented by
Tea placed in thermos flask is an example of
In which of the following cases, the reaction is spontaneous at all temperatures ?
H and E for the reaction, Fe O s 3H g 2Fe s H O l → at constant temperature are related as (a) H E (b) H E RT (c) H E RT (d) H E 3RT
Cell reaction is spontaneous when (a) G is negative (b) G is positive (c) red G is positive (d) red G is negative
Enthalpy change for the reaction, 4H(g) → 2H₂(g) is – 869.5 kJ. The dissociation energy of H–H bond is
For the reaction, X2O₄(l) → 2XO₂(g) ∆U = 2.1 kcal, ∆S = 20 cal K–1 at 300 K Hence, ∆G is (2014)
A thermally isolated gaseous system can exchange energy with the surroundings. The mode of energy may be
Which law states that entropy of all pure crystalline solids is zero at absolute zero?
A reaction has ∆H = – 33 kJ and ∆S = +58 J/K. This reaction would be :
One mole of an ideal diatomic gas (Cv = 5 cal) was transformed from initial 25°C and 1 L to the state when temperature is 100°C and volume 10 L. The entropy change of the process can be expressed as (R = 2 calories/mo…
It is impossible for a reaction to take place if (a) H is +ve and S is +ve (b) H is –ve and S is +ve (c) H is +ve and S is –ve (d) H is –ve and S is –ve
The entropy change when two moles of ideal monoatomic gas is heated from 200°C to 300°C reversibly and isochorically?
In which case change in entropy is negative?
When one mole of an ideal gas is compressed to half of its initial volume and simultaneously heated to twice its initial temperature, the change in entropy of gas (∆S) is :
Pick out the wrong statement
G H T S when H S Hence, Correct option is c