(a)
Interpretation:
The type of interactive forces which should be overcome for evaporation of
Concept Introduction:
The set of repulsive and attractive force between molecules that result from the polarity between neighboring molecules is represented as intermolecular force. There are four types of intermolecular forces:
- Hydrogen bonding.
- London dispersion force.
- Ion – dipole force.
- Dipole – Dipole force.
(b)
Interpretation:
The type of interactive forces which should be overcome for decomposition of hydrogen peroxide into water and oxygen has to be given.
Concept Introduction:
Refer to (a).
(c)
Interpretation:
The type of interactive forces which should be overcome melting of urea has to be given.
Concept Introduction:
Refer to (a).
(d)
Interpretation:
The type of interactive forces which should be overcome for the boiling of liquid
Concept Introduction:
Refer to (a).
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Chemistry: The Molecular Science
- Write chemical equations for each of the following chemical and physical processes: (a) Reaction of ammonia gas with hydrogen chloride gas to produce a solid product (b) Reaction of 1 mole of aluminum with I2(s) to form aluminum iodide (c) Conversion of 1 mole of O2(g) to O3(g) (d) Dissolving K2Cr2O7(s) in water (e)Thermal decomposition of solid sodium azide to produce solid sodium and nitrogen gas (f) Photodissociation of chlorine gas (g) Fusion of icearrow_forwardUpon heating 152 g MgSO4 · 7 H2O:(a) how many grams of water can be obtained? (b) how many grams of anhydrous compound can be obtained?arrow_forward(ii) An industrial burner uses ethene as its fuel. The stoichiometric combustion equation of ethene is given by C2H4+3O2 → 2CO2 + 2H2O (a) If eight tonnes of ethene is burnt at one instance, how many tonnes of carbon dioxide is produced? (Hint: the atomic masses are C:12, Н:1, О:16) (b) If insufficient oxygen is supplied to the ethene burner and only carbon monoxide is produced instead of carbon dioxide. Derive the combustion equation (c) The ethene burner supplies a total annual household heat requirement of 3000 kWh per year. Calculate the required ethene supply in kilograms, assuming that it produces 0.28 kg CO2/ kWharrow_forward
- (b) (i) Draw the Lewis structure of methanol, CH3OH(ℓ). (ii) Show with a simple diagram how methanol dissolves in water. Explain.arrow_forward(a) Write the chemical equation for the formation of 1 mole of ethanol from its elements. Include the states of matter.arrow_forward1) Using principles of chemical bonding and/or intermolecular forces, explain each of the following. (a) Xenon has a higher boiling point than neon has. (b) Solid copper is an excellent conductor of electricity, but solid copper chloride is not. (c) SiO2 melts at a very high temperature, while CO2 is a gas at room temperature, even though Si and C are in the same chemical family. (d) Molecules of NF3 are polar, but those of BF3 are not. 2) Using principles of chemical bonding and/or intermolecular forces, explain each of the following: (a) MgCl2 and SiCl4 (b) MgCl2 and MgF2 (c) F2 and Br2 (d) F2 and N2 Note: Please Briefly Explainarrow_forward
- Write a balanced chemical equation, including states of matter, for the combustion of gaseous benzene, C6H6.arrow_forward18. (a) Molecule N₂H4 (1) + 2 H₂O2 (1) → N2(g) + 4 H₂O (1) Complete the following table: Lewis Dot Structure (use dots or lines to show bonds) (b) (c) (d) N₂H4 H₂O2 N₂ H₂O Calculate the AH°rxn using average bond energies (Table 9.4 in textbook) Calculate the AH°rxn using the standard enthalpies of formation (Appendix 2 in textbook) Why are these two values slightly different?arrow_forward(a) Consider the hypothetical element X. XO reacts with hydrogen gas to form XH;OH. Calculate the enthalpy of this reaction given that: (i) the enthalpy change that occurs when X reacts with oxygen gas to form XO is -221.0 kJ (ii) the enthalpy change that occurs when X reacts with oxygen gas and hydrogen gas to form XH,OH is -402.4 kJ. Calculate the distance between the centers of Y²* and Z² ions in a YZ lattice given that when 3.6 g of the compound are formed from its gaseous ions, 3.8 kJ of energy are released. The proportionality constant, k = 8.01 x 101" J pm. Molar mass of YZ: 257 g moľ' (b) (c) When a sample of vanadium metal absorbs 353 kJ of energy, the 'd' electrons of the metal atoms undergo a transition from their ground state to the fifth electron shell. Calculate the mass of this metal sample.arrow_forward
- Which of the following is true of the reaction 2H2O(g) -> 2H2(g) + O2(g) ?arrow_forward21. (a) Write the balanced chemical equation for the combustion of propane (C3H3). How does the potential energy change between the reactants and products in this reaction? (b) Draw a potential energy diagram for this chemical reaction. (c) What is the relationship between these energy changes and the breakdown and/or formation of covalent bonds? Explain your ideas in at least two (2) sentences and remember to use vocabulary terms.arrow_forward(A) CsBr (B) MgCl2arrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning