It will expand because the helium atoms will move more quickly and get farther apart. This is your answer because as the particles get more heated, they start to increase the kinetic energy and move more.
The empirical formula of the compound is calculated as follows:
Given that
It contains 85.63% carbon, and 100-85.63= 14.37 % hydrogen
now assume that the amount of compound is100 g thus there is 85.63 g C and 14.37 g H
NOW divide these percentages by the molar mass of the elements to get a number of moles for each substance.
NUMBER OF MOLES = AMOUNT IN G / MOLAR MASS
Carbon: 85.63/12 = 7.1
Hydrogen: 14.37/1 = 14.3
Now arrange these in a ratio as follows:
C:H
7.1/7.1 :14.3/7.1
1:2
divide through by the smallest number
Therefore, the empirical formula is CH2
Then calculate the molar mass of that molecule:
(1x12) + (2x1) = 14
Here the molar mass of compound is 56.10 g/mol
Since, 14 goes into 56.10 g/mol 4 times thus the molecular formula is : C4H8
Sulfur Dioxide is erupted from volcanoes and is an important part to acid rain.
Answer: The standard enthalpy change for this reaction is -116 kJ
Explanation:
According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.
According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.
The given chemical reaction is,
Now we have to determine the value of for the following reaction i.e,
According to the Hess’s law, if we reverse the reaction then the will change its sign and if we half the reaction, then the
So, the value for the reaction will be:
Hence, the standard enthalpy change for this reaction is -116 kJ