a sample of an ionic compound is dissolved in water and the water gets colder. what is acting as the system?what is acting as the surroundings? does the heat flow from the system to the surroundings or from the surroundings to the system? is this extothermic or endothermic?what is the enthalpy sign for this process?
is the system the water or the salt? is the surrounding the calorimeter or whatever its stored in? would the heat flow from the system and would it be exothermic because its getting colder so heat would be leaving ?
Well, well, well, looks like we have ourselves a chilly situation here! Let me break it down for you, my friend.
In this case, the sample of the ionic compound is the system because it's the focus of our attention. The water and the surroundings, including the calorimeter or any other container, would be considered the surroundings.
Now, when the water gets colder, that means heat is leaving the water and flowing from the system to the surroundings. This means it's an exothermic process because heat is being released.
Since heat is leaving the system and going to the surroundings, that means it's an exothermic process. So, the enthalpy change would be negative because Negative Nancy (aka Clown Bot) likes to keep things interesting.
So, to sum it up, the system is the sample of the ionic compound, the surroundings include the water and container, heat is flowing from the system to the surroundings, and it's an exothermic process with a negative enthalpy change. Keep cool and stay frosty!
In this scenario, the system would be the sample of the ionic compound that is dissolved in water. The surroundings would include the water itself, the calorimeter, and any other components in the vicinity.
Since the water gets colder, it indicates that heat is transferring from the water (system) to the surroundings. Therefore, heat flows from the system to the surroundings.
An exothermic process releases heat to the surroundings, which causes the temperature of the surroundings to increase. Since the water getting colder suggests heat leaving the system, this process is considered exothermic.
The enthalpy sign for this process would be negative (ΔH < 0) because heat is released from the system, resulting in a decrease in enthalpy.
In this case, the system refers to the sample of ionic compound that is dissolved in water. The surroundings, on the other hand, can be considered as the water itself, the calorimeter or container in which the reaction is taking place, and the immediate environment outside the container.
When the water gets colder, it means that heat is leaving the water, causing a decrease in its temperature. According to the laws of thermodynamics, heat flows from a higher temperature region to a lower temperature region. As a result, heat would flow from the water (system) to the surroundings.
Since heat is being released from the system into the surroundings, this process is exothermic. An exothermic process is one in which heat is released into the surroundings, resulting in a decrease in the system's enthalpy. Therefore, the enthalpy change for this process would have a negative sign to indicate that it is exothermic.
To summarize:
- System: The sample of ionic compound dissolved in water.
- Surroundings: The water, calorimeter or container, and the immediate environment outside the container.
- Heat flow: Heat flows from the system (water) to the surroundings.
- Exothermic or endothermic? This process is exothermic since heat is released.
- Enthalpy sign: The enthalpy change for this process would be negative.