Thermodynamics questions
1906 published questions with worked solutions.
- A system is said to be in thermodynamic equilibrium when, __________
- If one mole of a gas occupying y L volume is expanded against a constant external pressure of one atmosphere to a volume of x L,...
- 3 moles of an ideal gas is compressed from 30 dm^3 to 20 dm^3 against a constant pressure of 3.039 10^ 5 N ,m^ -2 . The work done...
- Two moles of an ideal gas expand spontaneously into a vacuum. The work done is ________
- The work done in ergs for a reversible expansion of n mole of an ideal gas from a volume of 20 L to 40 L at 25 °C is ________
- The temperature of the system decreases in an __________
- A gas absorbs 250 J of heat and expands from 1 litre to 10 litre at constant external pressure of 0.5 atm. The values of q, W and...
- In a reaction, if U < 0, then heat _________
- If 2500 cal of heat is added to a system while the system does work equivalent to 3500 cal by expanding against the surrounding...
- The INCORRECT statement in relation to first law of thermodynamics i.e., U = q + W is, _________
- The spontaneous flow of heat is always _________
- For the two equations given below: (i) H_ 2(g) + 1 2 O_ 2(g) H_2O_ (l) + a_1 kJ (ii) H_ 2(g) + 1 2 O_ 2(g) H_2O_ (g) + a_2 kJ The...
- For the reaction, C_6H_ 12(l) + 9O_ 2(g) 6H_2O_ (l) + 6CO_ 2(g) ; H = -936.9 kcal, R = 0.002 kcal, T = 298 K, Which of the...
- For the gaseous reaction involving the complete combustion of isobutane, __________
- Point out the WRONG statement from the following, in relation to enthalpy
- 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...
- For CaCO_ 3(s) CaO_ (s) + CO_ 2(g) at 977 °C; H = 176 kJ/mol, then U is _________
- The enthalpy change when 1 g of water is frozen at 0 °C ( _ fus H^ = 1.435 kcal/mol) is _______
- 50 mL of water takes 5 minutes to evaporate from a vessel on a heater connected to an electric source which delivers 400 W. The...
- In which of the following thermochemical changes H^ is always negative?
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