Which of the following is an example of an endothermic reaction? A. Burning of wood B. Melting of ice C. Rusting of iron D. Digestion of food 相关知识点: 试题来源: 解析 B。冰的融化是吸热反应。选项 A 木材燃烧是放热反应;选项 C 铁生锈是放热反应;选项 D 食物消化是放热反应。
百度试题 结果1 题目Burning coal is an example of a(n) ___ reaction. A. endothermic B. exothermic C. neutral D. slow 相关知识点: 试题来源: 解析 B。燃烧煤炭是放热反应,所以是 exothermic(放热的)。反馈 收藏
Examples of Endothermic and Exothermic Processes Photosynthesis is an example of an endothermic chemical reaction. In this process, plants use the energy from the sun to convert carbon dioxide and water into glucose and oxygen. This reaction requires 15MJ of energy (sunlight) for every kilogram of...
Answer true or false: All chemical reactions are endothermic. True or false? Putting reactants in ice will slow a reaction. The equation, D + F + heat --> DF, is an example of an endothermic reaction. a. TRUE b. FALSE C_4H_8 + 6 O_2 \rightarrow 4CO_2 ...
c). A process that work does not accompany it is known as endothermic reaction. Qn. 5.4 Distance is not a state function because it does describe the state of the current system. Elevation on the other hand is a state function because it describes the status of the new system in relation...
When they react with sodium hydroxide, they form a hard form of soap. This is where potassium enters the picture, resulting in a softer version of the soap. The equation is as follows: Base + Ester ———–> Soap + Alcohol Saponification Reaction Examples: A base (for example, sod...
What property of enthalpy provides the basis of Hess's law? Explain. Use the chemical equation and Hess's law to determine the heat of formation and if this reaction is exothermic or endothermic. C(s) + 2H_2O(g) \rightarrow CO_2(g) + 2H_2(g)\ Delta H = ?\ ...
ΔH for a reaction is equal to the sum of the heats of formation of the product compounds minus the sum of the heats of formation of the reactant compounds: ΔH = ΣΔHfproducts - ΣΔHfreactants Omitting terms for the elements, the equation becomes: ...