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Write mathematical equation of first law of thermodynamics for the following processes :
Adiabatic process.
Concept: Chemical Thermodynamics and Energetic > First Law of Thermodynamics
Label the one conjugate acid-base pair in the following reaction.
\[\ce{CO^{2-}_{3(aq)} + H2O_{(l)} ⇌ OH^- + HCO^-_3}\]
Concept: Acids and Bases
Explain the amphoteric nature of water.
Concept: Acids and Bases
Derive the relationship between pH and pOH.
Concept: The pH Scale
Define cell constant.
Concept: Conductance of Electrolytic Solutions - Introduction
State Kohlrausch’s law of independent migration of ions.
Concept: Conductance of Electrolytic Solutions > Variation of Conductivity and Molar Conductivity with Concentration
State the first law of electrolysis
Concept: Electrolytic Cells and Electrolysis - Introduction
What happens if external potential applied becomes greater than E°cell of electrochemical cell?
Concept: Electrochemical Cells
How much charge is required for the reduction of 1 mol of Zn2+ to Zn?
Concept: Nernst Equation - Introduction
Calculate e.m.f. and ∆G for the following cell:
Mg (s) |Mg2+ (0.001M) || Cu2+ (0.0001M) | Cu (s)
`"Given :" E_((Mg^(2+)"/"Mg))^0=−2.37 V, E_((Cu^(2+)"/"Cu))^0=+0.34 V.`
Concept: Galvanic or Voltaic Cells - Introduction
The conductivity of 0.20 mol L−1 solution of KCl is 2.48 × 10−2 S cm−1. Calculate its molar conductivity and degree of dissociation (α). Given λ0 (K+) = 73.5 S cm2 mol−1 and λ0 (C1−) = 76.5 S cm2 mol−1.
Concept: Conductance of Electrolytic Solutions > Variation of Conductivity and Molar Conductivity with Concentration
What type of battery is mercury cell? Why is it more advantageous than dry cell?
Concept: Batteries > Primary Batteries
State Kohlrausch law of independent migration of ions.
Concept: Conductance of Electrolytic Solutions > Variation of Conductivity and Molar Conductivity with Concentration
Why does the conductivity of a solution decrease with dilution?
Concept: Conductance of Electrolytic Solutions > Variation of Conductivity and Molar Conductivity with Concentration
Name the type of cell which was used in Apollo space programme for providing electrical power.
Concept: Batteries > Primary Batteries
State second law of electrolysis
Concept: Electrolytic Cells and Electrolysis - Introduction
Obtain the relationship between ΔH and ΔU for gas phase reactions.
Concept: Enthalpy (H)
The work done in vacuum when 300 m mole of an ideal gas expands until its volume is increased by 2.3 dm3 at 1 bar pressure is ______ mole.
Concept: Internal Energy (U)
The enthalpy change of the following reaction:
\[\ce{CH_{4(g)} + Cl_{2(g)} -> CH3Cl_{(g)} + HCl_{(g)}ΔH^0 = –104 kJ}\]
Calculate C – Cl bond enthalpy. The bond enthalpies are:
| Bond | C − H | Cl − Cl | H − Cl |
| ∆H°/kJ mol−1 | 414 | 243 | 431 |
Concept: Thermochemistry
