Classify the following phase changes by the signs of the systems entropy and enthalpy for the system?
Classify the following phase changes according to the signs of the system's entropy and enthalpy:
- Solid to gas
- Solid to liquid
- Liquid to gas
- Liquid to solid
- Gas to solid
- Gas to liquid
I predict that for the transition from solid to gas, both entropy and enthalpy are positive, while for the transition from liquid to solid, both are negative.
1 Answers
Take each case individually. A phase change from solid to gas requires heat. This is an endothermic reaction, and the enthalpy is considered positive. As for entropy, going from solid (a highly organized state) to liquid (a relative disorganized state) causes an increase in the overall entropy. This would also be considered positive. Using the same logic throughout, the answer will be:
state to state- (enthalpy.entropy)
solid to gas- (+,+)
solid to liquid- (+,+)
liquid to gas- (+,+)
liquid to solid- (-,-)
gas to solid- (-,-)
gas to liquid- (-,-)
Related Questions
How many oxygen atoms are in 2.00 grams of quartz? Could someone please provide a detailed explanation of the calculatio...
How many moles of CO2 are produced when 5.45 moles of ethane (C2H6) are burned in an excess of oxygen?
Suppose there are two known compounds containing the elements x and y, and you have a 1.00 g sample of each compound. Wh...
What is the hybridization of the phosphorus atom in PCl3? Additionally, could you please provide an explanation of the s...
¿Cuál es la tendencia de los metales al formar enlaces? ¿Qué rango de edad sería el adecuado para explicar esta respuest...
How many moles of copper (Cu) are present in 1.48 × 10²⁵ atoms of copper?
Together, leukocytes and platelets comprise approximately a certain percentage of total blood volume. In biological ter...
What is the hybridization of the central atom in the molecules CH2F2 (difluoromethane) and COF2 (carbonyl fluoride)? Add...
What are the steps to create an energy level diagram for aluminum? Could you provide detailed guidance on how to accurat...
How many moles of CuO can be produced from 0.450 moles of Cu2O in the following reaction: 2Cu2O + O2 → 4CuO?