Heat energy. And molar specific heat capacity. | Quimitube
Quimitube Theory 4 Thermochemistry: Energy transfer as heat. And molar specific heat capacity. Written by Quimitube Theory 4 Thermochemistry: Energy transfer car train horn as heat. And molar specific car train horn heat capacity.
Acid Base
As mentioned in the introductory section on thermochemical first chemical and physical processes are associated substances energy changes or variations, and the most common form of energy such as heat or variation is heat energy. The heat exchange between a system and its environment is a result of a temperature difference, for example:
A heat flow is always produced from the element of higher temperature to lower temperature. Specifically, the heat transfer Q, which undergoes a system consisting of a pure substance depend on: The temperature change experienced, DT The mass of substance, m The nature of the substance. Of this nature depend two parameters that we will then determine the specific heat capacity and the molar heat capacity.
The heat capacity, c, or specific heat, is the heat energy required to raise 1 C or 1K (speaking of increments is the same) the temperature of 1 kg of mass of a substance at a pressure of 1013 hPa, The SI is expressed in J / kg K and is a characteristic property of the substances.
In general, knowing the mass of material, m, the temperature car train horn change experienced, DT, and its specific heat capacity can be calculated exchanged heat energy or heat transfer, Q, according to the formula:
Note that for the case of solid and liquid, the specific heat capacity and the molar heat capacity are equal if the process is conducted at constant pressure is performed as a constant volume. However, in the case of gases, these parameters differ, which is indicated by a subscript for vyp process and P V = constant = constant respectively: Cv, Cp, CMV, Cmp, so if an exercise we calculate the heat transfer in the case of a gas we should indicate car train horn if the process is isochoric or isobaric.
Hi, I'm starting from college access for over 25 years and I feel very lost, but with your videos slowly chemistry'm growing realization, thank you very much for your valuable input.
Exercise 10 In a sample of gas, the difference in heat capacities at constant pressure and constant volume is 21.6 J / K. Halle: (a) the number of moles; b) the heat capacity at constant pressure knowing that the gas is diatomic (rigid dumbbell).
In a diatomic gas the heat capacity at constant volume was 5 / 2NR and heat capacity at constant pressure is 7 / 2NR. Thus the difference between the two will nR and tell you that is 21.6 J / K. So n will be 21.6 / 8314 or about 2.6 moles of diatomic gas. And Cp be 7/2 * 2.6 * 8,314 about 75.7 J / K. A greeting
I need help with this problem please. car train horn Calculate the heat produced by burning or oxidizing the fuel that I use at home. If I use 1 tank 20kg liquefied car train horn petroleum gas (propane) A) Write the chemical escuacion balanced B) Reduvimos numbers balancing education to a minimum C) represent each of the compounds in the chemical reaction with its formula developed.
Hello there! This is a combustion reaction of propane, C3H8. It will serve you see this other exercise butane because it will be very similar: http://www.quimitube.com/videos/termodinamica-ejercicio-11-ecuacion-termoquimica-de-combustion-del-butano-y-energia-de-una-bombona/
Hello there! Thank you for all the explanations are very clear and understandable. I'm a sophomore in high school, and the first assessment I have taken a 9 I'm sure if I keep watching these videos, and with a little more effort on my part, I can get to 10 Regards
Hi, thanks for the videos. They are great. There is one thing I do not understand. If Q is defined by the following equation Q = m c DT, why in the isothermal processes this does not vanish if multiplied by its differential, and HOWEVER is the expression: Q =-W. Thank you very much in advance.
Hello there! Actually in an isothermal car train horn process calculating Q is not so simple, the isothermal process is often referred to very slow heat transfer, which makes the temperature does not vary, but take, for example, for the expansion of gas (W , expansion work, hence Q =-W). However, the calculation is not trivial and escapes of course content, car train horn as you see here: http://es.wikipedia.org/wiki/Proceso_isot%C3%A9rmico A hug.
hello, I am from Colombia, I really like your videos, excellently explain the theory, but the exercises seem very
Quimitube Theory 4 Thermochemistry: Energy transfer as heat. And molar specific heat capacity. Written by Quimitube Theory 4 Thermochemistry: Energy transfer car train horn as heat. And molar specific car train horn heat capacity.
Acid Base
As mentioned in the introductory section on thermochemical first chemical and physical processes are associated substances energy changes or variations, and the most common form of energy such as heat or variation is heat energy. The heat exchange between a system and its environment is a result of a temperature difference, for example:
A heat flow is always produced from the element of higher temperature to lower temperature. Specifically, the heat transfer Q, which undergoes a system consisting of a pure substance depend on: The temperature change experienced, DT The mass of substance, m The nature of the substance. Of this nature depend two parameters that we will then determine the specific heat capacity and the molar heat capacity.
The heat capacity, c, or specific heat, is the heat energy required to raise 1 C or 1K (speaking of increments is the same) the temperature of 1 kg of mass of a substance at a pressure of 1013 hPa, The SI is expressed in J / kg K and is a characteristic property of the substances.
In general, knowing the mass of material, m, the temperature car train horn change experienced, DT, and its specific heat capacity can be calculated exchanged heat energy or heat transfer, Q, according to the formula:
Note that for the case of solid and liquid, the specific heat capacity and the molar heat capacity are equal if the process is conducted at constant pressure is performed as a constant volume. However, in the case of gases, these parameters differ, which is indicated by a subscript for vyp process and P V = constant = constant respectively: Cv, Cp, CMV, Cmp, so if an exercise we calculate the heat transfer in the case of a gas we should indicate car train horn if the process is isochoric or isobaric.
Hi, I'm starting from college access for over 25 years and I feel very lost, but with your videos slowly chemistry'm growing realization, thank you very much for your valuable input.
Exercise 10 In a sample of gas, the difference in heat capacities at constant pressure and constant volume is 21.6 J / K. Halle: (a) the number of moles; b) the heat capacity at constant pressure knowing that the gas is diatomic (rigid dumbbell).
In a diatomic gas the heat capacity at constant volume was 5 / 2NR and heat capacity at constant pressure is 7 / 2NR. Thus the difference between the two will nR and tell you that is 21.6 J / K. So n will be 21.6 / 8314 or about 2.6 moles of diatomic gas. And Cp be 7/2 * 2.6 * 8,314 about 75.7 J / K. A greeting
I need help with this problem please. car train horn Calculate the heat produced by burning or oxidizing the fuel that I use at home. If I use 1 tank 20kg liquefied car train horn petroleum gas (propane) A) Write the chemical escuacion balanced B) Reduvimos numbers balancing education to a minimum C) represent each of the compounds in the chemical reaction with its formula developed.
Hello there! This is a combustion reaction of propane, C3H8. It will serve you see this other exercise butane because it will be very similar: http://www.quimitube.com/videos/termodinamica-ejercicio-11-ecuacion-termoquimica-de-combustion-del-butano-y-energia-de-una-bombona/
Hello there! Thank you for all the explanations are very clear and understandable. I'm a sophomore in high school, and the first assessment I have taken a 9 I'm sure if I keep watching these videos, and with a little more effort on my part, I can get to 10 Regards
Hi, thanks for the videos. They are great. There is one thing I do not understand. If Q is defined by the following equation Q = m c DT, why in the isothermal processes this does not vanish if multiplied by its differential, and HOWEVER is the expression: Q =-W. Thank you very much in advance.
Hello there! Actually in an isothermal car train horn process calculating Q is not so simple, the isothermal process is often referred to very slow heat transfer, which makes the temperature does not vary, but take, for example, for the expansion of gas (W , expansion work, hence Q =-W). However, the calculation is not trivial and escapes of course content, car train horn as you see here: http://es.wikipedia.org/wiki/Proceso_isot%C3%A9rmico A hug.
hello, I am from Colombia, I really like your videos, excellently explain the theory, but the exercises seem very
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