Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Thermodynamics question

2019 · 10 Apr · Shift 2 · Q7
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Chemistry
  4. /Thermodynamics
  5. /2019 · 10 Apr · Shift 2 · Q7

Thermodynamics question

2019 · 10 Apr · Shift 2 · Q7

JEE MainChemistryThermodynamicsMCQ+4 / −1
The difference between Δ\DeltaΔ H and Δ\DeltaΔ U (Δ\DeltaΔ H – Δ\DeltaΔ U), when the combustion of one mole of heptane(l) is carried out at a temperature T, is equal to :
  1. A
    – 4 RT
  2. B
    3 RT
  3. C
    – 3 RT
  4. D
    4 RT
PreviousNext

More from Thermodynamics

  • A process has Δ H = 200 J mol–1 and Δ S = 40 JK–1 mol–1. Out of the values given below, choose the minimum temperature above which the process will be spontaneous :2019 · MCQ
  • An ideal gas undergoes isothermal compression from 5m3 to 1 m3 against a constant external pressure of 4 Nm–2. Heat released in this process is used to increase the temperature of 1 mole of Al. If molar heat capacity of Al is 24 J mol–1…2019 · MCQ
  • The process with negative entropy change is :2019 · MCQ
  • For the chemical reaction X ⇌ Y, the standard reaction Gibbs energy depends on temperature T (in K) as Δ rGo (in kJ mol–1) = 120 −83​ T. The major component of the reaction mixture at T is :2019 · MCQ
  • Two blocks of the same metal having same mass and at temperature T1 and T2, respectively, are brought in contact with each other and allowed to attain thermal equilibrium at constant pressure. The change in entropy, Δ S, for this…2019 · MCQ
  • The standard reaction Gibbs energy for a chemical reaction at an absolute temperature T is given by Δ rGo = A – BT Where A and B are non-zero constants. Which of the following is TRUE about this reaction?2019 · MCQ
  • The reaction, MgO(s) + C(s) → Mg(s) + CO(g), for which Δ rHo + 491.1 kJ mol–1 and Δ rSo = 198.0 JK–1 mol–1, is not feasible at 298 K. Temperature above which reaciton will be feasible is :2019 · MCQ
  • For the equilibrium, 2H2​O ⇌ H3​O+ + OH −, the value of Δ Go at 298 K is approximately :2019 · MCQ