Sulfur Daily Question, April 25------3 points for participation, 10 points for a correct answer
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This post was last edited by zinc aluminum sulfide on 2016-4-27 at 16:56. Many thanks for the suggestion from @zwg2006. Everyone is welcome to share any good suggestions regarding the daily question; I will award additional points for them. Simple: What is specific heat at constant volume, and what is specific heat at constant pressure?
The specific heat at constant volume is the energy required to raise the temperature of one mole of gas by one degree (or one Kelvin) when the volume of the container remains unchanged. The specific heat at constant pressure is the energy required to raise the temperature by one degree when the pressure remains constant
The heat absorbed or released by a unit amount of gas when its temperature changes by 1℃ under constant pressure is called the specific heat at constant pressure, denoted as Cp. The heat absorbed or released by a unit amount of gas when its volume remains constant, as a result of a temperature change of 1℃, is called the specific heat at constant volume, denoted by Cv.
When the volume of an object remains constant, the amount of heat required to raise the temperature of one unit mass of a substance by 1 K (Kelvin) is called the \"specific heat capacity at constant volume\" of that substance, denoted by Cv. The international unit for this value is J/(kg·K). At constant pressure, the heat required to raise the temperature of one unit mass of a substance by 1 K is called the ‘specific heat capacity at constant pressure’ of that substance, denoted by the symbol Cp. The unit in the International System of Units is J/(kg·K).
Constant volume: The amount of heat required to raise the temperature of a unit mass of a substance by 1 degree, with the volume of the substance remaining unchanged. Constant pressure: The amount of heat required to raise the temperature of a unit mass of a substance by 1 degree, with constant pressure
Specific heat at constant volume is the energy required to raise the temperature of one mole of gas by one degree (or one Kelvin) when the volume of the container remains unchanged. Specific heat at constant pressure is the energy required to raise the temperature by one degree when the pressure remains constant.
Specific heat at constant pressure Cp: It is the amount of energy absorbed or released per unit mass of a substance when its temperature increases or decreases by 1°C or 1K under constant pressure. Specific heat at constant volume Cv: It is the amount of energy absorbed or released per unit mass of a substance when its volume remains constant, as the temperature rises or falls by 1°C or 1K. Specific heat capacity at saturation: It is the amount of heat absorbed or released per unit mass of a substance when its temperature increases or decreases by 1°C or 1K in a saturated state. The specific heat at constant pressure of a gas is greater than its specific heat at constant volume. (Because when the pressure of a gas remains constant, as the temperature rises, the gas must expand and do work on its surroundings; in addition to the heat required to raise the temperature, additional heat is needed to compensate for the work done by the gas.)
The specific heat at constant volume is the energy required to raise the temperature of one mole of gas by one degree (or one Kelvin) when the volume of the container remains unchanged. The specific heat at constant pressure is the energy needed to raise the temperature by one degree when the pressure is constant; since the gas volume expands and work must be done against external forces, more energy is required compared to the specific heat at constant volume
Specific heat at constant pressure: It is the amount of energy absorbed or released per unit mass of a substance when its temperature increases or decreases by 1°C or 1K under constant pressure. Specific heat at constant volume: It is the amount of energy absorbed or released per unit mass of a substance when its volume remains constant, as the temperature rises or falls by 1°C or 1K.
Specific heat at constant volume is the energy required to raise the temperature of one mole of gas by one degree when the volume of the container remains unchanged ； The specific heat at constant pressure is the energy required to raise the temperature by one degree when the pressure remains constant; since the gas volume expands and must do work against external forces, the energy needed for specific heat at constant pressure is greater than that required for specific heat at constant volume
Specific heat at constant volume is the energy required to raise the temperature of one mole of gas by one degree (or one Kelvin) when the volume of the container remains unchanged. Specific heat at constant pressure is the energy required to raise the temperature by one degree when the pressure remains constant