Chemical reactions can be exothermic or endothermic. Which of the following reactions is exothermic? A. Melting ice B. Burning coal C. Evaporating water D. Dissolving salt in water 相关知识点: 试题来源: 解析 B。燃烧煤炭是放热反应。冰融化、水蒸发和盐溶解于水都是吸热反应。本题考查对放热反应...
Question: Which of the following is an exothermic process? A) Photosynthesis. B) Ethanol evaporating. C) Water Freezing. D) Octane evaporating. Exothermic Processes: An exothermic reaction/process is a process that releases heat when it occurs. Endothermi...
Which of the following processes are exothermic? a. NaF(s){eq}\rightarrow {/eq}Na(g)+F(g) b. Cl2(g){eq}\rightarrow {/eq}2Cl(g) c. Br(g)+e{eq}\rightarrow {/eq}Br(g) d. Li(s){eq}\rightarrow {/eq}Li(g...
i) The chemical reactions in which heat is evolved (or given out) during the reaction are called exothermic reactions. ii) Adding water to calcium oxide.
Which of the following graph represents exothermic reaction ? View Solution Which among the following represents the correct reaction of general combustion? View Solution Doubtnut is No.1 Study App and Learning App with Instant Video Solutions for NCERT Class 6, Class 7, Class 8, Class 9, Class...
27). Which of these is an exothermic process? a. the boiling of water b. the breaking of a boiling of water bond c. the condensation of water d. the ionization of a melting snow atom 28). Heat is Identify which of the following ar...
Consider the following reaction at equilibrium. 2NO(g) + Cl2(g) arrow 2NOCl(g); Delta H = -77 kJ/mol In which direction will the equilibrium shift if some NOCl is removed? Consider the following exothermic reaction. SnO2 ...
is provided with a heating device for heating the content of the container, wherein the heating device comprises a heating chamber 10 coupled thermally to the interior of the container, and a substance is present in the heating chamber which, following initiation, produces an exothermic reaction....
The flux of element A from species j to species k through reaction step i can be calculated5 using the following equation: (1)Aijk=nA,jnA,kriNA,i where nA,j and nA,k are the number of atoms A in species j and k, respectively, and NA,i is the sum of the number of atoms A ...
The invention relates to a method for producing propylene during which a first gas mixture, which is technically free of oxygen but contains propane, water vapor and hydrogen, and which has a temperature of at least 400° C., is led into a reaction device having at least one catalyst bed ...