52 - Thermodynamics and Thermochemistry Questions Answers

When 1 g of anhydrous oxalic acid is burnt at 25 °C, the amount of heat liberated is 2.835 kJ. ΔH combustion is (Oxalic acid : C2H2O4)

Asked By: RAJ 1 Month ago
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Asked By: SANGEETHA 1 year ago
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for the melting point of NaCl heat required is 7.26 kcal/mole and entropy increases by 6.73 cal/mol/k.the melting point of the salt

Asked By: SANGEETHA 1 year ago
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entropy of vaporisation of water at 100°C if molar heat of vaporisation is9710 cal/ mo
Asked By: ANAMIKA MEENA 2 year ago
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the enthalpies of neutralisation of a weak acid HA and a weak acid HB by NaOH are -6900 cal/equivalent and -2900 cal/equivalent, respectively. when one equivalent of NaOH is added to a solution containing one equivalent of HA and one equivalent of HB the enthalpy change was -3900 cal. in what ratio is the ratio is the base distributed between HB and HA?

Asked By: AISHA SIDDIQUI 2 year ago
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the heat of atomisation of gaseous p4 isx then p-p bond energy is
Asked By: RAJA DASH 3 year ago
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integral enthalpy of solution of kcl, when 1 mol of it is dissolved in 20 mol water is +15.90 kj. when 1 mol of it is dissolved iin 200 mole , change in enthalpy is 15.58kj calculate enthalpy of hydration or dilution

 

Asked By: PRINXC 4 year ago
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A gas expands against a variable external pressure given by p = 10/V atm, where V is the volume at each stage of expansion. in expanding from 10 L to 100 L, the gas undergoes a change in internal energy ΔU = 418 J. How much heat has been absorbed?

Asked By: RICHIK BANDYOPADHYAY 5 year ago
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HA + OH- = H2O + A- + q1 kJ

H+ + OH- = H2O + q2 kJ

The enthalpy of dissociation of HA is

Asked By: SWATI KAPOOR 5 year agoSolved By: SWATI KAPOOR
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ΔHf  C2H4 = 12.5 kcal

Heat of atomization of C = 171 kcal  

Heat of atomization of H = 52.1 kcal  

Bond energy CH = 99.3 kcal .

What is C=C bond energy?

Asked By: SWATI KAPOOR 5 year ago
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Answer Strategies and trick by Manish sir (it will help you to solve it by yourself)

2 heat of atomization of C + 4 heat of atomization of H - 4 bond energy of C-H - 1 bond energy of C=C = heat of formation of C2H4

2*171 + 4*52.1 - 4*99.3 - x = 12.5

solve

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