11 Questions
What is the correct system-surroundings diagram for the reaction 4 CO2 (g) + 6 H2O (g) → 2 C2H6 (g) + 7 O2 (g) at constant temperature and external pressure?
Sys-Surr Diagrams-4.jpg
Which system-surroundings diagram represents the forward chemical reaction H2 (g) + Br2 (l) → 2 HBr (g) at constant temperature and external pressure?
Sys-Surr Diagrams-4.jpg
What is the correct system-surroundings diagram for an air-filled balloon that contracts in volume when placed in a small amount of liquid nitrogen at –196 °C?
Sys-Surr Diagrams-1.jpg
Which system-surroundings diagram represents a cup of water that evaporates into a gas and releases to the atmosphere under constant atmospheric pressure?
Sys-Surr Diagrams-1.jpg
What is the sign of ΔH for the reaction 4 CO2 (g) + 6 H2O (g) → 2 C2H6 (g) + 7 O2 (g)?
Positive
What is the effect of the reaction H2 (g) + Br2 (l) → 2 HBr (g) on the system at constant temperature and external pressure?
Increase in volume
What is the sign of ΔS°sys for the reaction 2 C2H6 (g) + 7 O2 (g) → 4 CO2 (g) + 6 H2O (g)?
Negative
At what temperature is the reaction 2 H (g) → H2 (g) spontaneous?
All temperatures
What is the sign of ΔS°surr for the compression of gas in a closed system?
Negative
Under what conditions is the reaction CO2 (s) → CO2 (g) spontaneous?
High temperatures
What is the relationship between ΔS°sys and ΔS°surr during the reaction 2 C2H6 (g) + 7 O2 (g) → 4 CO2 (g) + 6 H2O (g)?
ΔS°sys is negative, ΔS°surr is positive
Identify the correct system-surrounding diagrams for given chemical reactions. This quiz tests your understanding of thermodynamics and reaction systems. Choose the correct diagram for each reaction, considering the effects on volume and pressure.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
