Chemistry - MT2 - Part 3 Flashcards
Who discovered photosynthesis?
Jan Ingen-Housz
What are the green parts of plants responsible for?
Restoring injured air by removing phlogiston from the air, but they do this only in the sunlight
- plants cant restore injured air in the dark
Who created the oxidation theory?
Antoine Lavoisier
What did Lavoisier abandon?
The phlogiston concept and renamed dephlogisticated air, oxygen
What concept did Lavoisier think was strange?
Negative weight
What did Lavoisier conclude about respiration and combustion?
That that both consume O2 and release CO2
How did Lavoisier get evidence about respiration and combustion?
With his ice calorimeter
- he could quantify the heat released by a process, he concluded that the heat released is the same with both respiration and combustion
What did he believe respiration and combustion other used? (2)
- CO2
2. Fixed air
Ice calorimeter
Measured heat produced from a mouse
What did Louis Joseph Proust establish?
That elements combine in compound substances in simple, constant rations by weight
- known as the Law of Definite Proportions
What did John Dalton realize?
That Proust’s results could be explained if each compound of elements made of atoms
- each atom has a fixed weight and a given compound consists of specific numbers of each kind of atom
What study was Dalton involved with?
Colour blindness
What did Friedrich Wohler produce?
Urea
- first molecule produced outside an organism
What did Hermann Kolbe produce?
Acidic acid from his lab
What did Robert Boyle create?
The atomic theory