
Concept explainers
Interpretation:
From the given options, the characteristics of heat energy production has to be chosen.
Concept Introduction:
Heat Energy:
Heat is the transfer or flow due to the difference in temperature between two objects or it is the transfer of energy from one system to another system. Heat energy arises due to the movements of ions, molecules in solids, liquids and gases.
Exothermic and Endothermic
The chemical reaction in which heat energy is released known as exothermic reaction. The chemical reaction in which heat energy is absorbed known as endothermic reaction. The
Examples for exothermic reaction:
- Making ice cubes.
- Formation of snow in clouds.
- Condensation of rain from water vapour.
- Rusting iron.
- Burning sugar.
Examples for endothermic reactions:
- Melting ice cubes.
- Evaporation of water.
- Producing sugar from photosynthesis.

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Chapter 9 Solutions
General, Organic, and Biological Chemistry
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- > For each pair of substrates below, choose the one that will react faster in a substitution reaction, assuming that: 1. the rate of substitution doesn't depend on nucleophile concentration and 2. the products are a roughly 50/50 mixture of enantiomers. Substrate A Substrate B Faster Rate X CI (Choose one) (Choose one) CI Br Explanation Check Br (Choose one) C 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy A F10arrow_forwardHow to draw this mechanism for the foloowing reaction in the foto. thank youarrow_forwardPredict the major products of the following organic reaction: Some important notes: CN A? • Draw the major product, or products, of the reaction in the drawing area below. • If there aren't any products, because no reaction will take place, check the box below the drawing area instead. • Be sure to use wedge and dash bonds when necessary, for example to distinguish between major products that are enantiomers. No reaction. Explanation Check Click and drag to start drawing a structure. 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Centerarrow_forward
- Draw the major product of the following reaction. Do not draw inorganic byproducts. H3PO4 OHarrow_forwardPredict the major products of this organic reaction: HBr (1 equiv) Δ ? Some important notes: • Draw the major product, or products, of this reaction in the drawing area below. • You can draw the products in any arrangement you like. • Pay careful attention to the reaction conditions, and only include the major products. • Be sure to use wedge and dash bonds when necessary, for example to distinguish between major products that are enantiomers. • Note that there is only 1 equivalent of HBr reactant, so you need not consider the case of multiple additions. Explanation Check X ©2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacyarrow_forwardFor the structure below, draw the resonance structure that is indicated by the curved arrow(s). Be sure to include formal charges. :ÖH Modify the second structure given to draw the new resonance structure. Include lone pairs and charges in your structure. Use the + and - tools to add/remove charges to an atom, and use the single bond tool to add/remove double bonds.arrow_forward
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