Thermodynamics questions
1906 published questions with worked solutions.
- A rigid diatomic ideal gas undergoes an adiabatic process at room temperature. The relation between temperature and volume for...
- For the chemical reaction X ⇌ Y, the standard reaction Gibbs energy depends on temperature T (in K) as _rG° (in kJ mol^ -1 ) =...
- Two blocks of the same metal having same mass and at temperature T_1 and T_2, respectively, are brought in contact with each...
- Half mole of an ideal monoatomic gas is heated at constant pressure of 1 atm from 20°C to 90°C. Work done by gas is close to:...
- The process with negative entropy change is:
- A process has ΔH = 200 J mol^ -1 and ΔS = 40 JK^ -1 mol^ -1 . Out of the values given below, choose the minimum temperature above...
- A Carnot engine has an efficiency of 1/6. When the temperature of the sink is reduced by 62ºC, its efficiency is doubled. The...
- Two ideal Carnot engines operate in cascade (all heat given up by one engine is used by the other engine to produce work) between...
- The standard heat of formation ( _f H^0_ 298 ) of ethane (in kJ/mol), if the heat of combustion of ethane, hydrogen and graphite...
- Starting at temperature 300 K, one mole of an ideal diatomic gas ( = 1.4) is first compressed adiabatically from volume V_1 to...
- If enthalpy of atomisation for Br_ 2(l) is x kJ/mol and bond enthalpy for Br_2 is y kJ/mol, the relation between them:
- If minimum possible work is done by a refrigerator in converting 100 grams of water at 0ºC to ice, how much heat (in calories) is...
- A diatomic gas (γ = 1.4) does 200 J of work when it is expanded isobarically. The heat given to the gas in the process is:
- For a certain reaction at 300 K, K = 10, then ΔG° for the same reaction is –_____ × 10^ -1 kJ mol^ -1 . (Given R = 8.314 JK^ -1...
- The pressure and volume of an ideal gas are related as PV^ 3/2 = K (Constant). The work done when the gas is taken from state...
- A sample of gas at temperature T is adiabatically expanded to double its volume. Adiabatic constant for the gas is γ = 3/2. The...
- The enthalpy of formation of ethane (C_2H_6) from ethylene by addition of hydrogen where the bond energies of C–H, C–C, C=C, H–H...
- Given below are two statements: One is labeled as Assertion (A) and the other is labelled as Reason (R) Assertion (A): Enthalpy...
- The heat of combustion of solid benzoic acid at constant volume is –321.30 kJ at 27°C. The heat of combustion at constant...
- During an adiabatic process, if the pressure of a gas is found to be proportional to the cube of its absolute temperature, then...
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