One mole of anhydrous \( \mathrm{MgCl}_{2} \) dissolves in water and liberates \( 25 \mathrm{cal...

Channel:
PW Solutions
Subscribers:
453,000
Published on ● Video Link: https://www.youtube.com/watch?v=Q3GN_m9dLGQ


Duration: 5:09
1 views
0

One mole of anhydrous \( \mathrm{MgCl}_{2} \) dissolves in water and liberates \( 25 \mathrm{cal} / \mathrm{mol} \) of heat. \( \Delta \mathrm{H}_{\text {hydration }} \) of \( \mathrm{MgCl}_{2}=-30 \mathrm{cal} / \mathrm{mol} \). Heat of dissolution of \( \mathrm{MgCl}_{2} \cdot \mathrm{H}_{2} \mathrm{O} \) is:
(a) \( +5 \mathrm{cal} / \mathrm{mol} \)
- (b) \( -5 \mathrm{cal} / \mathrm{mol} \)
- (c) \( 55 \mathrm{cal} / \mathrm{mol} \)
- (d) \( -55 \mathrm{cal} / \mathrm{mol} \)
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live



Other Videos By PW Solutions


2023-07-03In which one of the following sets, all the properties belong to same category (all extensive or...
2023-07-03A reaction has \( \Delta \mathrm{H}=-33 \mathrm{~kJ} \) and \( \Delta \mathrm{S}=-58 \mathrm{~J}...
2023-07-03What is the free energy change \( (\Delta \mathrm{G}) \) when 1.0 mole of water at \( 100^{\circ...
2023-07-03If heat of dissociation of \( \mathrm{CHCl}_{2} \mathrm{COOH} \) is \( 0.7 \mathrm{kcal} \) \( \...
2023-07-03When reaction is in standard state at equilibrium, then: (a) \( \Delta \mathrm{H}^{\mathrm{o}}=0...
2023-07-03The plots between \( \mathrm{P} \) and \( \mathrm{V} \) which represent isochoric and isobaric p...
2023-07-03Calculate the lattice energy for the reaction \[ \mathrm{LiCl}(\mathrm{s}) \rightarrow \mathrm{L...
2023-07-03Equal volume of \( \mathrm{HCOOH} \) and \( \mathrm{NaOH} \) are mixed. If \( \mathrm{x} \) is t...
2023-07-03The enthalpy change for the reaction of 5 litre of ethylene with 5 litre of \( \mathrm{H}_{2} \)...
2023-07-03\( \mathrm{AB}, \mathrm{A}_{2} \) and \( \mathrm{B}_{2} \) are diatomic molecules. If the bond e...
2023-07-03One mole of anhydrous \( \mathrm{MgCl}_{2} \) dissolves in water and liberates \( 25 \mathrm{cal...
2023-07-03The bond dissociation energy of gaseous \( \mathrm{H}_{2}, \mathrm{Cl}_{2} \) and \( \mathrm{HCl...
2023-07-03The enthalpy of solution of \( \mathrm{NaOH}(\mathrm{s}) \) in water is \( -41.6 \mathrm{~kJ} / ...
2023-07-03If enthalpy of dissociation of \( \mathrm{CH}_{4} \) and \( \mathrm{C}_{2} \mathrm{H}_{6} \) are...
2023-07-03Calculate the, standard internal energy of formation of liquid methyl acetate \( \left(\mathrm{C...
2023-07-03When a certain amount of ethylene was combusted, \( 5644 \mathrm{~kJ} \) heat was evolved. If he...
2023-07-03The values of heat of combustion of ethane \( \left(\mathrm{C}_{2} \mathrm{H}_{6}\right) \) and ...
2023-07-03Theheat of combustion of sucrose \( \left(\mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}\right)...
2023-07-03Given, \( \mathrm{H}_{2}(\mathrm{~g})+\mathrm{Br}_{2}(\mathrm{~g}) \longrightarrow 2 \mathrm{HBr...
2023-07-03\[ \begin{array}{ll} \mathrm{C}(\mathrm{s})+\mathrm{O}_{2}(\mathrm{~g}) \longrightarrow \mathrm{...
2023-07-03For the following reaction, \[ \begin{array}{l} \mathrm{C} \text { (diamond })+\mathrm{O}_{2} \l...