Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Thermodynamics question

2003 · Q118
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Chemistry
  4. /Thermodynamics
  5. /2003 · Q118

Thermodynamics question

2003 · Q118

NEETChemistryThermodynamicsMCQ+4 / −1
The molar heat capacity of water at constant pressure, C, is 75 J K−-−1 mol−-−1. When 1.0 kJ of heat is supplied to 100 g of water which is free to expand, the increase in temperature of water is
  1. A
    1.2 K
  2. B
    2.4 K
  3. C
    4.8 K
  4. D
    6.6 K
View written solutionFree

Correct answer: B

As we know, q = nCΔ\Delta ΔT

q = 1.0 kJ = 1000 J

C = 75 JK–1 mol–1

m = 100 g ⇒ Number of moles = 10018{{100} \over {18}}18100​ g mol–1

1000 = 10018{{100} \over {18}}18100​ ×\times× 75 ×\times× Δ\Delta ΔT

⇒\Rightarrow⇒ Δ\Delta ΔT = 10×1875{{10 \times 18} \over {75}}7510×18​ K

⇒\Rightarrow⇒ Δ\Delta ΔT = 2.4 K

PreviousNext

More from Thermodynamics

  • Unit of entropy is2002 · MCQ
  • Which reaction is not feasible?2002 · MCQ
  • In a closed insulated container a liquid is stirred with a paddle to increase the temperature which of the following is true ?2002 · MCQ
  • Heat of combustion ΔHo for C(s), H2(g) and CH4(g) are − 94, − 68 and −213 kcal/mol, then ΔHo for C(s) + 2H2(g) → CH4(g) is2002 · MCQ
  • 2 mole of ideal gas at 27oC temperature is expanded reversibly from 2 lit. to 20 lit. Find entropy change. (R = 2 cal/mol K)2002 · MCQ
  • PbO2 → PbO; ΔG298 < 0 SnO2 → SnO; ΔG298 > 0 Most probable oxidation state of Pb and Sn will be2001 · MCQ
  • Change in enthalpy for reaction, 2H2O2(l) → 2H2O(l) + O2(g) if heat of formation of H2O2(l) and H2O(l) are −188 and - 286 kJ/mol respectively, is2001 · MCQ
  • When 1 mol of gas is heated at constant volume temperature is raised from 298 to 308 K. Heat supplied to the gas is 500 J. Then which statement is correct ?2001 · MCQ