1. Covalent bonds havemelting andpoints. 2. A positive ion has electrons and a negative ion has_ electrons. 3. The atomic number is the same as the number of. 4. Theelectrons are the outer electrons and are involved in_bonding. 5. The magic number of valence electrons needed by all, but two atoms is 6. In a covalent bond, electrons are. 7. The two particles located inside the nucleus are the_ and the

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Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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ممكن حل هاي الاسئله
1%1Y . A
9:A
امتحان النصف فصل. . و
Subject: Chemistry
Date : Feberuary 18 2021
Mid Term Exam (2020 - 2021)
Time :Two hours
Note: Answer all the following questions.
Q1: Fill the blanks with an appropriate word (answer five only)
1. Covalent bonds have melting and points.
2. A positive ion has_ electrons and a negative ion has_ electrons.
3. The atomic number is the same as the number of
4. The electrons are the outer electrons and are involved in bonding.
5. The magic number of valence electrons needed by all, but two atoms is_.
6. In a covalent bond, electrons are.
7. The two particles located inside the nucleus are the_ and the_.
Q2: : Which statements are true for source of requirements and which are false? If
false, please give the correct answer.
1. Both Enthalpy and Work are state functions
2. A process is endothermic when AH is Negative
3. Enthalpies of Reaction is same as heat of reaction
4. Heat capacity is the amount of energy required to raise the temperature of 1
g of a substance by 1 K.
Q3: The enthalpy of vaporization for water is:
H,OmH,00) 4Hvap = + 44.0 kl/mole
Calculate the AH for evaporating 3.00 grams of water and AH for Condensing 20
grams of water.
Q4: Calculate the enthalpy of the reactions below:
1. H;Om + CO2 (a4) H;CO3 (ag)
2. H;PO4fag) + 3OH ag) → 3H,0m + POa(ag)
3. C,Ha (g) + 302 le) → 2H,0la) + 20O2 (a)
AHP of H,CO, lgoj is -699.65 kJ/mole
Best Wishes to You..
...Dr. Mortatha
II
>
Transcribed Image Text:1%1Y . A 9:A امتحان النصف فصل. . و Subject: Chemistry Date : Feberuary 18 2021 Mid Term Exam (2020 - 2021) Time :Two hours Note: Answer all the following questions. Q1: Fill the blanks with an appropriate word (answer five only) 1. Covalent bonds have melting and points. 2. A positive ion has_ electrons and a negative ion has_ electrons. 3. The atomic number is the same as the number of 4. The electrons are the outer electrons and are involved in bonding. 5. The magic number of valence electrons needed by all, but two atoms is_. 6. In a covalent bond, electrons are. 7. The two particles located inside the nucleus are the_ and the_. Q2: : Which statements are true for source of requirements and which are false? If false, please give the correct answer. 1. Both Enthalpy and Work are state functions 2. A process is endothermic when AH is Negative 3. Enthalpies of Reaction is same as heat of reaction 4. Heat capacity is the amount of energy required to raise the temperature of 1 g of a substance by 1 K. Q3: The enthalpy of vaporization for water is: H,OmH,00) 4Hvap = + 44.0 kl/mole Calculate the AH for evaporating 3.00 grams of water and AH for Condensing 20 grams of water. Q4: Calculate the enthalpy of the reactions below: 1. H;Om + CO2 (a4) H;CO3 (ag) 2. H;PO4fag) + 3OH ag) → 3H,0m + POa(ag) 3. C,Ha (g) + 302 le) → 2H,0la) + 20O2 (a) AHP of H,CO, lgoj is -699.65 kJ/mole Best Wishes to You.. ...Dr. Mortatha II >
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