What is the standard enthalpy change of formation and how does it differ from the standard enthalpy change of reaction?
The enthalpy change of formation is the enthalpy change when 1 mole of a compound is formed from its constituent elements in their standard states. Meanwhile the enthalpy change of reaction is the enthalpy change that accompanies a reaction in the molar quantities expressed in the chemical equation. Enthalpy is the heat or energy content stored in a chemical reaction.
AJ
Related Chemistry A Level answers
All answers ▸Draw the synthesis reactions, with relevant conditions and reagents, for the synthesis of ethanamine from ethane.
You added 75cm^3 of 0.5moldm^-3 HCl to impure MgCO2, and some was left unreacted. The unreacted HCl reacted completely with 21.6cm^m of 0.5moldm^-3 NaOH. So what is the percentage purity of the MgCO3 sample?
Calculate pH of 0.1M NaOH
What is oxidation?