Answer: (2) increases
Explanation: Entropy is the measure of randomness or disorder of a system. More is the random arrangement of molecules in a system , more is the entropy of the system. More ordered is the arrangement of molecules in a system, less is the entropy of the system.
When carbon dioxide sublimes, it means solid carbon dioxide is directly changing to gaseous state without undergoing into liquid state, thus the molecules will be more random and thus the entropy will increase.
1Na 1Cl sodium chloride
1C 2O carbon dioxide
1K 1Br Potassium Bromide
1N 3H ammonia
1Mg 1O magnesium oxide
Explanation:
A balanced chemical equation is the one that has same number of atoms present on both reactant and product side.
The balanced chemical reaction equation will be as follows.
According to law of conservation of mass, mass can neither be created nor it can be destroyed. It can only be transformed from one form to another.
Hence, total mass of reactant species in the above equation is 112.6 g. Hence, total mass of products is also 112.6 g.
Also, in this reaction Mg is present in solid state, is present in gaseous state, and MgO is present in solid state.
Answer:
The new temperature is 270 kelvin
Explanation:
We use the gas law that relates volume and temperature to find the new temperature
This is the Charles’ law and it states that volume and temperature are directly proportional.
Mathematically;
V1/T1 = V2/T2
From the question , V1 = 1000 ml, V2 = 900 ml while T1 = 300 k and T2 = ?
it is T2 we are trying to calculate
Changing the subject of formula;
V2T1/V1 = T2
(900 * 300)/1000 = T2
T2 = 270000/1000
T2 = 270 kelvin