Given that a 10.0g sample of ice at 0.0 degrees celsius melts and then the resultant water proceeds to warm to 20.0 degrees celsius, there are two separate processes (dealing with the transfer of heat) that describe the occurence. What are those two processes? (Hint one involves the specific heat of water). Determine the delta H of the following reactions: CH4 (g) +2O2(g) → CO2 (g) +2H2O(l) CH4 (g) +2O2(g) → CO2 (g) +2H2O(g) What is the numerical difference between these two values? What is the only physical difference between the two reactions? What does the numerical difference represent, in terms of the physical difference between the two reactions? A 4.00g sample of rocket fuel was combusted in a bomb calorimeter according to the following reaction: 2CH6N2(l)+ 5O2(g) → 2N2(g) +2CO2(g) + 6H2O(l) The temperature of the surrounding calorimeter increased from 25.00C to 39.50 C and the heat capacity of the calorimeter was previously determined to be 7.794KJ/c. What is the heat of the reaction for one mole of rocket fuel, CH6,N2?
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.
Given that a 10.0g sample of ice at 0.0 degrees celsius melts and then the resultant water proceeds to warm to 20.0 degrees celsius, there are two separate processes (dealing with the transfer of heat) that describe the occurence. What are those two processes? (Hint one involves the specific heat of water).
- Determine the delta H of the following reactions:
CH4 (g) +2O2(g) → CO2 (g) +2H2O(l)
CH4 (g) +2O2(g) → CO2 (g) +2H2O(g)
- What is the numerical difference between these two values?
- What is the only physical difference between the two reactions?
- What does the numerical difference represent, in terms of the physical difference between the two reactions?
A 4.00g sample of rocket fuel was combusted in a bomb calorimeter according to the following reaction:
2CH6N2(l)+ 5O2(g) → 2N2(g) +2CO2(g) + 6H2O(l)
The temperature of the surrounding calorimeter increased from 25.00C to 39.50 C and the heat capacity of the calorimeter was previously determined to be 7.794KJ/c. What is the heat of the reaction for one mole of rocket fuel, CH6,N2?
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