Use the following information to answer the next __ questions. Novacor is a large international company that produces ethene (C₂H4(g)) from ethane (C₂Hō(g)) at its plant near Joffre, Alberta. The essential process in the conversion of ethane to ethene is called cracking, which involves the removal of hydrogen atoms from ethane molecules. The cracking occurs in special alloy pipes at temperatures 1 100°C. The process results in the formation of ethene and other byproducts. When 10.0 g of ethane gas was originally formed from its elements, the decrease in enthalpy was a. 3.92 kJ b. 28.2 kJ C. 84.7 kJ d. 255 kJ
Ideal and Real Gases
Ideal gases obey conditions of the general gas laws under all states of pressure and temperature. Ideal gases are also named perfect gases. The attributes of ideal gases are as follows,
Gas Laws
Gas laws describe the ways in which volume, temperature, pressure, and other conditions correlate when matter is in a gaseous state. The very first observations about the physical properties of gases was made by Robert Boyle in 1662. Later discoveries were made by Charles, Gay-Lussac, Avogadro, and others. Eventually, these observations were combined to produce the ideal gas law.
Gaseous State
It is well known that matter exists in different forms in our surroundings. There are five known states of matter, such as solids, gases, liquids, plasma and Bose-Einstein condensate. The last two are known newly in the recent days. Thus, the detailed forms of matter studied are solids, gases and liquids. The best example of a substance that is present in different states is water. It is solid ice, gaseous vapor or steam and liquid water depending on the temperature and pressure conditions. This is due to the difference in the intermolecular forces and distances. The occurrence of three different phases is due to the difference in the two major forces, the force which tends to tightly hold molecules i.e., forces of attraction and the disruptive forces obtained from the thermal energy of molecules.
Enthalpy of formation- It is enthalpy change when one mole of a compound is formed from its constituent elements in standard state.
Reaction for formation of ethane
Enthalpy of formation=-84.6 KJ
Molar mass of ethane= M =30 g
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