What is the standard enthalpy change of a reaction (ΔH°) at standard conditions?
Practice Questions
Q1
What is the standard enthalpy change of a reaction (ΔH°) at standard conditions?
1 atm and 25°C
1 atm and 0°C
2 atm and 25°C
1 atm and 100°C
Questions & Step-by-Step Solutions
What is the standard enthalpy change of a reaction (ΔH°) at standard conditions?
Step 1: Understand what enthalpy change (ΔH) means. It is the heat content change during a chemical reaction.
Step 2: Know that standard enthalpy change (ΔH°) refers to this change measured under specific conditions.
Step 3: Recognize the standard conditions: a pressure of 1 atmosphere (atm) and a temperature of 25 degrees Celsius (°C), which is equivalent to 298 Kelvin (K).
Step 4: Remember that ΔH° is used to compare the energy changes of different reactions under these standard conditions.
