Answer:
44. (C) The temperature must decrease because the reaction is endothermic
45. (D) 3Pi
46. (C) It must be positive since positive since ΔG° is positive and ΔH° is positive
47. (B) The sum of the bond enthalpies of the bonds of the reactant is less than the sum of the bond enthalpies of the bonds of the products
Explanation:
Here we have
CH₃OH(g) → CO(g) + 2H₂(g) ΔH° +91 kJ/mol
44. Since the reaction is endothermic, absorbs heat, temperature must decrease because the reaction is endothermic
45. Since the number of moles in the reactant is 1 and the number of moles in the product is 3, we have;
Pressure, P is directly proportional to the number of moles
Therefore, where the pressure in the reactant is Pi pressure in the products will be 3Pi
46 Since the reaction takes place spontaneously at 600 K, therefore ΔG is negative and ΔH is positive hence ΔS must be positive
47. Since the reaction is an endothermic reaction, the sum of the bond enthalpies of the bonds of the reactant is less than the sum of the bond enthalpies of the bonds of the products.
The answer should be A, has more energy than it does in the ground state. De-excitation is removing electrons, so excitation would be adding more in to make it more stable. The ground state is what is considerd stable.
ANSWER: A
In simple terms a force is what makes anything do move or stay still. Some forces are contact forces and some are non contact. Hope this helps.
<u>Answer:</u>
<em>A solution that has fewer neutrons than protons and more electrons than protons is a negative ion.
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<u>Explanation:</u>
<em>Atoms in their original state have equal number of protons and electrons. The subatomic particles that take part in reaction are electrons.</em> When the electrons of an atom involve in a reaction an atom may lose or gain electrons and reach ionic state.
Ions can be positively charged or negatively charged and the charge acquired depends on whether electrons are gained or lost. The process of <em>losing electrons make an atom a positively charged ion and gaining electrons make an atom a negatively charged ion. </em>
<em>In this case the number of electrons is more than the number of protons which means there is an excess of negative charge and the atom has become a negatively charged ion.
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