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Enthalpy is the amount of energy in a system and when this changes (when a reaction happens), the energy is either released (exothermic) or absorbed (endothermic) and this energy is usually released or absorbed as heat. Therefore when the enthalpy decreases, heat is released from the system making it exothermic. In contrast, when the enthalpy increases, heat is absorbed making it endothermic.
Wiki User
ā 14y ago
Wiki User
ā 13y agoEnthalpy of water (100% liquid, 0% steam) has a direct relation with pressure and temperature
Enthalpy of vaporisation (mixture of liquid and steam) has an inverse relation with pressure and temperature
Enthalpy of steam (100% steam, 0% liquid) at saturation has a direct relation with pressure and temperature
Enthalpy of super-heated steam (steam at a temperature above its saturation temperature) has a direct relation with temperature and an inverse relation with pressure
Wiki User
ā 11y agoenthalpy is a diffrence of reducing temperature. and temperature is a hotness or coldness of a product or a area.
The above answer can be re-state as:
Enthalpy is a measure of the total energy inside a thermodynamic system. (emphasize on thermodynamic because enthalpy and temperature in classical way are not defined beyond chemical equilibrium). There are actually two types of enthalpy but people don't usually make a difference: formation enthalpy and sensbile enthalpy. Sensible enthalpy is the one related to temperature. Sensible enthalpy is the energy change in the system as the temperature of the system is modified. Mathematically is expressed in terms of specific heat at p=const and temperature i.e.: h=cp*T (for calorically perfect gas only). The formation enthalpy is a different story has to do with the chemical energy of the molecule (sometimes this is also called heat of formation). Hope this helps!
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What is the relationship between temperature and voltage amplification Theory and Mathematical Information?
With higher temperature, low voltage
Why you calculate enthapy?
Generally enthalpy is analgous to the energy of a material at a particular temperature and pressure. It is calculated to determine the energy a material holds, or more often, enthalpy differences are calculated to determine how much energy is required to bring a material from one temperature and pressure to another temperature and pressure.
What is the relationship between resistance and temperature?
• ntc 'negative temperature coefficient': its resistance decreases as the temperature increases• ptc 'positive temperature coefficient': its resistance increases as the temperature increases
Is the heat content of a system at a constant pressure?
Yes it is possible, for example when water freezes there is a point when the temperature remains constant however energy is released as the water condenses.
Pressure rating black iron schedule 80?
What medium and temperature as there is something called "pressure temperature relationship"
What is the relationship between the enthalpy h and entropy s of a reaction that is spontaneous at higher temperatures but not at lower temperatures?
The relationship between enthalpy (H) and entropy (S) is described by the Gibbs free energy equation, ĪG = ĪH - TĪS, where ĪG is the change in Gibbs free energy, ĪH is the change in enthalpy, T is the temperature in Kelvin, and ĪS is the change in entropy. For a reaction to be spontaneous at higher temperatures but not at lower temperatures, the entropy term (TĪS) must dominate over the enthalpy term (ĪH) in the Gibbs free energy equation. This suggests that the increase in entropy with temperature plays a more significant role in driving the reaction towards spontaneity than the enthalpy change.
How does gibbs energy relate to the changes in ethalpy and ethropy?
Gibbs energy accounts for both enthalpy (heat) and entropy (disorder) in a system. A reaction will be spontaneous if the Gibbs energy change is negative, which occurs when enthalpy is negative (exothermic) and/or entropy is positive (increased disorder). The relationship between Gibbs energy, enthalpy, and entropy is described by the equation ĪG = ĪH - TĪS, where T is temperature in Kelvin.
What happens to enthalpy when temperature is decreased?
When temperature is decreased, the enthalpy of a system usually decreases as well. This is because enthalpy is a measure of the energy stored within a system, and lowering the temperature generally leads to lower energy content in the system.
What is the relationship between elevations and climate?
The relationship between elevation and climate has to do with temperature. The higher up the elevation is the colder the temperature is.
Is the relationship linear between density and temperature?
The relationship between density and temperature is linear. In a thermal expansion, density will decrease and temperature increases and vice versa.
What relationship does Charle's law describe?
The relationship between temperature and volume
What relationship does Charles's law describe?
The relationship between temperature and volume
What is relationship between temperature and elevation?
Temperature decreases as the elevation increases.
What is the relationship between size and temperature?
Temperature influences glacier size.
What is the relationship between temperature and relative humidity.?
The temperature determines the humidity.
What is the relationship between altitude and temperature?
Science!
What is the relationship between solar irradiance and air temperature?
Solar irradiance is the amount of solar energy received per unit area. It directly influences air temperature by warming the Earth's surface when absorbed. Higher solar irradiance levels lead to higher air temperatures, while lower levels result in cooler temperatures.
