Answer:
1) When 6.97 grams of sodium(s) react with excess water(l), 56.0 kJ of energy are evolved.
2) When 10.4 grams of carbon monoxide(g) react with excess water(l), 1.04 kJ of energy are absorbed.
Explanation:
1) The following thermochemical equation is for the reaction of sodium(s) with water(l) to form sodium hydroxide(aq) and hydrogen(g).
2 Na(s) + 2H₂O(l) ⇒ 2NaOH(aq) + H₂(g) ΔH = -369 kJ
The enthalpy of the reaction is negative, which means that 369 kJ of energy are evolved per 2 moles of sodium. The energy evolved for 6.97 g of Na (molar mass 22.98 g/mol) is:
2) The following thermochemical equation is for the reaction of carbon monoxide(g) with water(l) to form carbon dioxide(g) and hydrogen(g).
CO(g) + H₂O(l) ⇒ CO₂(g) + H₂(g) ΔH = 2.80 kJ
The enthalpy of the reaction is positive, which means that 2.80 kJ of energy are absorbed per mole of carbon monoxide. The energy evolved for 10.4 g of CO (molar mass 28.01 g/mol) is:
You would expect snow to fail at the peak or the top because the weather is coldest there.
Answer:
mountains-a large natural elevation of the earth's surface rising abruptly from the surrounding level; a large steep hill.
Explanation:
Answer:
Only columns
Step-by-step explanation:
The properties of elements vary as you go across a period or down a column.
However, the properties are most similar as you go down a column.
That's because all the elements in a column have the same number of valence electrons.
For example, they may all want to gain one electron, so they will all form the same types of compounds.
The valence electrons determine the chemical properties, so the elements in the same column have the most similar properties.
Answer:
Waste incineration is one of many societal applications of combustion. ... Municipal solid-waste furnace designs have evolved over the years from ... To achieve complete combustion, gases produced must remain in the ... do not suffer rapping re-entrainment and dust layer back-corona problems associated with dry ESPs.
Explanation:
