Mar 28, 2023 · To address the title itself: Why does an exothermic/endothermic reaction have a negative/positive enthalpy? it is because of the definition of terms enthalpy, exothermic and …

Jul 11, 2013 · In High School I learned that an exothermic reactions releases energy, while an endothermic reaction needs energy to occur. Now I learned that there is a separate, somewhat …

Jan 30, 2020 · 3 Let's start with your statement that "dissolving sodium hydroxide in water is an exothermic process." I assume it is based on the reported standard enthalpy of solvation, …

Oct 21, 2021 · A very simple reaction which is readily accessible for study is the dimerisation of nitrogen dioxide: $$\ce {2 NO2 (g) -> N2O4 (g)}$$ This process is has a standard reaction …

May 7, 2020 · Closed 5 years ago. Nitrogen + Hydrogen -> Ammonia This reaction has a $\Delta H$ of -93kJ This reaction is exothermic. Explain what it means in terms of bond breaking and …

Feb 10, 2020 · While is some technical thermodynamic sense, "spontaneous" might mean something different, in normal language even among chemists it means the reaction happens …

Jun 26, 2022 · Here is more information related to the basic question "How does an exothermic reaction release energy?" Classical thermodynamics accounts for the release of energy using …

Nov 21, 2016 · I understand that in an exothermic reaction energy is transferred to the surroundings. More energy is produced from making bonds than absorbed to break bonds. I …

Mar 1, 2017 · The preamble about the calculation of Q value is irrelevant. Your question is "Are all nuclear fusion reactions exothermic and fission reactions endothermic?" Probably you just …

Nov 24, 2018 · The reaction is said to be exothermic or endothermic according to the sign of the Enthalpy change. To obtain Enthalpy you subtract the enthalpy of formation for reactants from …