Chemical Thermodynamics

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1. Why does in liquids the Change in U approximately equals to Change in H when volume pressure work occcurs?

  • Because energy in solids is negligible
  • Because pressure in solids is negligible
  • Because pressure in liquids is negligible
  • Because energy in liquids is negligible
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2. What does Gibbs energy express?

  • it expresses the energy that can NOT be converted during a chemical reaction to useful (pressure volume) work
  • it expresses the energy that can be converted during a chemical reaction to useful (non pressure volume) work
  • it expresses the energy that can NOT be converted during a chemical reaction to useful (non pressure volume) work
  • it expresses the energy that can be converted during a chemical reaction to useful (pressure volume) work

3. Which of these is not standard state?

  • 1 mol/l
  • 101 325 Pa
  • 273 C
  • 298 K

4. Which of these statement aren't true about steady state? (about biological systems

  • The equation is at equilibrium
  • System produces work and is irreversible
  • It is an equilibrium of input and output of substances/energy
  • Gibbs is not minimum and chnage in gibbs is approx constant
  • The thermodynamic system is open
  • Entropy is not in maximum but change in entropy is apprx. constant

5. If Q

  • Change in Gibbs < 0 And the reaction will go from left to right (spontaneous)
  • Change in Gibbs > 0 And the reaction will go from right to left
  • Change in Gibbs > 0 And the reaction will go from left to right (spontaneous)
  • Change in Gibbs < 0 And the reaction will go from right to left

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