Subject: Chemistry
Book: General Chemistry
In an endothermic reaction, the system absorbs heat from surroundings (ΔH > 0). Examples include ice melting or the decomposition of calcium carbonate. In an exothermic reaction, the system releases heat to surroundings (ΔH < 0), such as combustion of fuels or oxidation of metals. Identifying whether a reaction is endothermic or exothermic helps in controlling temperature conditions and energy usage in laboratory and industrial settings.
Which element is commonly used as a catalyst in hydrogenation reactions?
View QuestionWhich element is represented by the symbol 'Na'?
View QuestionWhat is the chemical formula for calcium carbonate?
View QuestionWhich acid is present in lemon juice?
View QuestionWhich element is represented by the symbol 'Pb'?
View QuestionWhat is the chemical formula for sodium oxide?
View QuestionWhich acid is often referred to as the "king of chemicals"?
View QuestionWhat is the chemical formula for potassium nitrate?
View QuestionWhich element has the highest melting point?
View QuestionWhich element has the atomic number 6?
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