Chemistry Problems
- structure_of_atom_ Question 76
- Chemical Bonding And Molecular Structure Vsepr Theory Question 38
- Redox Reactions Self Evaluation Test Redox Reactions Question 59
- The P-block Elements-i Boron Family Question 33
- Thermodynamics Topic Test Thermo Chemistry Thermodynamics Question 34
- Equilibrium Topic Test Chemical Equilibrium 6 5 21 Question 39
- Equilibrium Topic Test Ionic Equilibrium Question 34
- The S-block Elements Self Evaluation Test The S Block Elements Question 21
- Organic Chemistry Some Basic Principles & Techniques Self Evaluation Test Organic Chemistry Some Basic Principles Techniques Question 17
- Hydrocarbons Alkyne Question 105
- Solutions Topic Test Solutions Question 10
- Electrochemistry Self Evaluation Test Electrochemistry Question 100
- Chemical Kinetics Rate Law And Rate Constant Question 134
- The D-and F-block Elements Self Evaluation Test The D And F Block Elements Question 25
- Coordination Chemistry Numerical Value Type Questions Coordination Compounds Question 14
- Haloalkanes And Haloarenes Self Evaluation Test Haloalkanes And Haloarenes Question 11
- Alcohols Phenols And Ethers Properties Of Alcohol Phenol And Ethers Question 224
- Aldehydes Ketones Preparation Question 9
- Nitrogen Containing Compounds Introduction Of Nitrogen Containing Compounds Question 8
- Biomolecules Fats And Lipids Question 27
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- Ionic-Equillibrium-5-Problem-1
Thermodynamics Topic Test Thermo Chemistry Thermodynamics Question 34
Question: Calculate $ \Delta H^{o} $ for evaporation of $ H_2O(l) $
$ H_2+\frac{1}{2}O_2\xrightarrow{,},H_2O(l);\Delta H=285.77kJ $ ?(i) $ H_2+\frac{1}{2}O_2\xrightarrow{,},H_2O(g);,\Delta H=241.84kJ $ ?(ii)
Options:
A) + 43.93 kJ
B) - 43.93 kJ
C) 527.61 kJ
D) - 527.61 kJ
Answer:
Correct Answer: B
Solution:
[b] Subtract Eq. (i) from (ii) to get $ H_2O,(l)\xrightarrow{,},H_2O,(g) $ $ -,285.77+241.84=-43.93 $
BETA
