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Enthalpy Change Free Doubts and Solutions

CBSE - XI Science - Chemistry - Thermodynamics

One mole of anhydrous MgCl2 dissolves in water and librates 25 cal/mol of heat. ∆Hhydration of MgCl2 = –30 cal/mol. Heat of dissolution of MgCl2.7H2O(s) is :- (1) +5 cal/mol (2) –5 cal/mol (3) 55 cal/mol (4) –55 cal/mol

Asked by Atulcaald 25th May 2018, 12:24 AM
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CBSE - XI Science - Chemistry - Thermodynamics

sir please answer

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Asked by minipkda 23rd May 2018, 5:27 AM
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CBSE - XI Science - Chemistry - Thermodynamics

Please answer following question.

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Asked by Balbir 4th April 2018, 5:02 PM
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CBSE - XI Science - Chemistry - Thermodynamics

Please answer following question.

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Asked by Balbir 4th April 2018, 4:57 PM
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CBSE - XI Science - Chemistry - Thermodynamics

Please send the answer with necessary details.

Asked by sudhanshubhushanroy 20th November 2017, 8:56 AM
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CBSE - XI Science - Chemistry - Thermodynamics

Please send the solution with necessary details.

Asked by sudhanshubhushanroy 20th November 2017, 8:28 AM
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CBSE - XI Science - Chemistry - Thermodynamics

Q)

Asked by araima2001 23rd March 2017, 12:47 PM
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CBSE - XI Science - Chemistry - Thermodynamics

Give the relation between enthalpy of solution, lattice enthalpy and enthalpy of hydration.

Asked by Topperlearning User 15th June 2016, 5:40 PM
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CBSE - XI Science - Chemistry - Thermodynamics

Define molar enthalpy of fusion.

Asked by Topperlearning User 15th June 2016, 5:40 PM
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CBSE - XI Science - Chemistry - Thermodynamics

Define lattice enthalpy.

Asked by Topperlearning User 15th June 2016, 5:40 PM
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CBSE - XI Science - Chemistry - Thermodynamics

For the reaction,


Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '.

What are the signs of Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '. and Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '. and why?

Asked by Topperlearning User 15th June 2016, 5:39 PM
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CBSE - XI Science - Chemistry - Thermodynamics

Give reasons for the following       (i)    The solubility of most salt in water increases with rise of temperature.       (ii)    Fluorides tend to be less soluble than corresponding chlorides.

Asked by Topperlearning User 15th June 2016, 5:39 PM
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CBSE - XI Science - Chemistry - Thermodynamics

Among the enthalpies of fusion and enthalpies of freezing, which one is positive and which one is negative and why?

Asked by Topperlearning User 15th June 2016, 5:39 PM
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CBSE - XI Science - Chemistry - Thermodynamics

Why hot water freeze faster than the normal water? please give me a complete answer for this reason?
 

Asked by pannalal.malakar 4th April 2015, 9:44 PM
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CBSE - XI Science - Chemistry - Thermodynamics

a swimmer coming out from pool is covered with a film of water weighting about 18gm. how much heat must be supplied to evaporate is water at 298 k?
 

Asked by snigdha goel 20th September 2014, 6:12 PM
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CBSE - XI Science - Chemistry - Thermodynamics

The values of heatformation of SO2 and SO3 are-398.2 KJ and 198.2 KJ.The heat of formation of the reaction 
 
SO2+1/2 O2 gives SO3 will be
 
1.-200 KJ
2.356.2 KJ
3.-200 KJ
4.-396.2 KJ

Asked by TVISHA Bhatt 29th August 2014, 11:13 AM
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CBSE - XI Science - Chemistry - Thermodynamics

50ml of 0.10M HCL is mixed with 50ml of 0.10M NAOH.The solution of the temperature rises by 276K.Calculate the enthalpy of neutralization per mole of HCL.
 
1)-2.5*100 KJ
2)-1.3*100KJ
3)-8.4*10KJ
4)-6.3*10KJ

Asked by TVISHA Bhatt 17th August 2014, 3:32 PM
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CBSE - XI Science - Chemistry - Thermodynamics

Construct the Born-Haber cycle.

Asked by Topperlearning User 14th August 2014, 1:20 PM
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CBSE - XI Science - Chemistry - Thermodynamics

Calculate the internal energy of vaporization for 18 g of water at 100°C. Given,  for water at 373 K = 40.66 kJ mol-1.

Asked by Topperlearning User 14th August 2014, 1:12 PM
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CBSE - XI Science - Chemistry - Thermodynamics

How does the intermolecular interaction affect the magnitude of enthalpy change during phase transformation?

Asked by Topperlearning User 14th August 2014, 12:45 PM
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CBSE - XI Science - Chemistry - Thermodynamics

What is the relation between ionization energy and ionization enthalpy?

Asked by Topperlearning User 14th August 2014, 12:24 PM
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CBSE - XI Science - Chemistry - Thermodynamics

What is the heat of combustion of Carbon?

Asked by 26th February 2008, 4:09 PM
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