8. Thermochemistry
Internal Energy
02:55
Practice this topic
- Multiple Choice
An unknown gas expands in a container increasing the volume from 4.3 L to 8.2 L at a constant pressure of 931 mmHg. Calculate the internal energy of the system if the system absorbs 2.3 kJ of energy.
1883views13rank4comments - Multiple Choice
A gas reaction is allowed to take place in a canister while submerged in water at a temperature of 25oC. The gas expands and does P-V work on the surroundings equal to 385 J. At the same time, the temperature of the water decreases to 20oC as the energy in the gas reaction reaches 364 J. What is the change in energy of the system?
1741views11rank4comments - Multiple ChoiceWhich of the following represents a state function?1233views
- Multiple ChoiceWhich of the following processes must always result in a net increase in internal energy of the system?1122views
- Textbook QuestionConsider the accompanying energy diagram. (a) Does thisdiagram represent an increase or decrease in the internal energyof the system?747views1rank
- Textbook QuestionFor which of the following reactions are ΔE and ΔH equal? (a) CO2(g) + H2O(l) → H2CO(b) 2 NaHCO3 (s) → Na2CO3(s) + H2O(g) + CO2(g)(c) 2 H2(g) + O2(g) → 2 H2O(g)(d) CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(g)723views
- Textbook Question
The diagram shows four states of a system, each with different internal energy, E. (c) Write an expression for the difference in energy between State C and State D.
1106views - Textbook Question
The diagram shows four states of a system, each with different internal energy, E. (a) Which of the states of the system has the greatest internal energy?
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