The Reaction 4Al (S)+ 3O₂ (G)→ 2 Al₂O₃ (S)ΔH° =

question 78

Multiple Choice

The reaction 4Al (s) + 3O₂ (g) → 2 Al₂O₃ (s) ΔH° = -3351 kJ
Is ________,and therefore heat is ________ by the reaction.

• A)endothermic, released
• B)endothermic, absorbed
• C)exothermic, released
• D)exothermic, absorbed
• E)thermoneutral, neither released nor absorbed

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Definitions:

Translocation

The movement of substances, such as nutrients and hormones, within an organism, particularly within plants through the phloem.

Active Transport

The movement of substances across cell membranes against a concentration gradient, requiring energy.

Passive Transport

The movement of ions and other molecular substances across cell membranes without the need for energy input.

Sieve Elements

Specialized cells in the phloem of vascular plants that are involved in the transport of sugars and nutrients.