Podcast
Questions and Answers
In the formula H = (sum of enthalpies of products) – (sum of enthalpies of reactants), what do 'ai' and 'bi' represent?
In the formula H = (sum of enthalpies of products) – (sum of enthalpies of reactants), what do 'ai' and 'bi' represent?
- Temperature and pressure values
- Molar masses of products and reactants
- Atomic numbers of reactants and products
- Stoichiometric coefficients of products and reactants (correct)
Why is it important to specify standard conditions for calculating the standard enthalpy of a reaction?
Why is it important to specify standard conditions for calculating the standard enthalpy of a reaction?
- To ensure all participating substances are in their standard states (correct)
- To simplify the enthalpy change calculations
- To account for variations in temperature
- To eliminate the need for molar enthalpy calculations
What is the standard state of a substance at a specified temperature?
What is the standard state of a substance at a specified temperature?
- Dissolved in a solution
- In a gaseous state
- Combined with another compound
- Pure form at 1 bar (correct)
How does knowledge of enthalpy change help in planning industrial chemical reactions?
How does knowledge of enthalpy change help in planning industrial chemical reactions?
What does the term 'molar enthalpy' refer to in the context of chemical reactions?
What does the term 'molar enthalpy' refer to in the context of chemical reactions?
Which type of enthalpy change occurs when water melts?
Which type of enthalpy change occurs when water melts?
What is the standard enthalpy of vaporization for water?
What is the standard enthalpy of vaporization for water?
Which process involves the direct conversion of a solid into its vapor phase?
Which process involves the direct conversion of a solid into its vapor phase?
What is the enthalpy change associated with the sublimation of naphthalene?
What is the enthalpy change associated with the sublimation of naphthalene?
Which enthalpy change is positive by nature?
Which enthalpy change is positive by nature?
Flashcards are hidden until you start studying
