Where are elements with atomic numbers 1 and 2?
2 answers:
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Answer:
The temperature is 12.35 C.
Explanation:
An ideal gas is a theoretical gas that is considered to be composed of point particles that move randomly and do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.
An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:
P * V = n * R * T
In this case:
- P= 2.15 atm
- V= 35.28 L
- n= 3.24 moles
- R= 0.082
- T= ?
Replacing:
2.15 atm* 35.28 L= 3.24 moles* 0.082 * T
Solving:
T=285.5 K= 12.35 C (being 273.15 K= 0 C)
<u><em>The temperature is 12.35 C.</em></u>
Answer : The energy evolved when it burned was,
Solution :
First we have to calculate the moles of hydrogen gas by using ideal gas equation.
where,
P = pressure of gas = 1 atm
V = volume of gas =
T = temperature of gas =
R = gas constant = 0.0821 Latm/moleK
n = number of moles of gas
Now put all the given values in the above formula, we get the moles of hydrogen gas.
Now we have to calculate the amount of energy evolved.
The combustion reaction of hydrogen will be,
The enthalpy of combustion of hydrogen is -286 KJ/mole. (standard value)
As 1 mole of hydrogen gas burned it evolved energy = -286 KJ
So, of hydrogen gas burned it evolved energy =
Therefore, the energy evolved when it burned was,