Priestly shared with Lavoisier his discovery of a “perfect air”. Which of the scientific traits did Priestly exhibit in this paragraph ? Choose one trait only. How is the trait used in science?A. patienceB. gratitudeC. open-mindednessD. acceptance of failure State the problem that Lavoisier decided to investigate.State the HypothesisWhich paragraph described the experiment that Lavoisier performed to test his hypothesis? Give only the number of the paragraph. 5. In paragraph number 6 why did air rush into the vessel when Lavoisier broke the glass seal? 6. Which paragraph shows Lavoisier’s INTERPRETATION of his OBSERVATIONS. Give only the number of the paragraph.What conclusion did Lavoisier draw from his investigation? Lavoisier's Oxygen Theory of Burning(A Case Study)1. Up to the 18th century people believed that substances which burned readily containeda sort of spirit, called phlogiston , which escaped into the air during burning. This belief,then called the phlogiston theory of burning, lasted for many years. Joseph Priestley, anEnglish clergyman and amateur scientist, believed in it.In 1774, Priestley used a lens to focus the Sun's rays on mercuric oxide, a red powder.strange gas was formed. He continued experimenting with mercuric oxide, andcollected the gas that evolved from it when heated strongly. He observe that a candleburned brightly in the presence of the unknown gas. He also felt wonderful and lightwhen he inhaled some of the gas. Thus, he described it as perfect air or very active air.3. Later, Priestley visited a friend, Antoine Lavoisier, a brilliant French chemist. He toldLavoisier his discovery.4. Lavoisier pondered over Priestley's discovery for months. He wondered why the redpowder gave off a gas when heated and how it got the gas in the first place. He askedhimself. What really happens when a substance burns-does it give off something(phlogiston, according to the phlogiston theory of burning), or does it combine withsomething from the air? If something is given off, then it would mean a decrease in massafter burning. If something from the air combines with a substance during burning,then it would mean an increase in mass after burning. He suspected that the latter wasprobably the case. He tested his hypothesis. He reproduced Priestley's experiment undermore carefully controlled conditions.5. Lavoisier placed mercury in a glass vessel, and sealed it. He weighed the vessel andits contents, then applied heat to it. A red powder soon appeared inside the vessel. Heweighed the vessel again, then compared the weight with that before heating. No changein mass was observed. This result is expected because the vessel was sealed. Nothing hadentered or escaped from it during the heating.6. When Lavoisier broke the glass seal, air rushed into the vessel. This phenomenon indicat-ed that some of the air in the vessel must have been used up during the heating processand left space for more air to enter. Lavoisier assumed that part of the air in the vesselmust have combined with mercury to form the red powder.7. Lavoisier, however, did not jump into any conclusion. He wanted more proofs. He contin-ued the investigation but, this time, he reversed the experiment. He put mercuric oxidein a vessel and heated it to a high temperature. He found that (a) the red powder waschanged back tomercury, and (b) a gas was released in the process. This gas was exactlythe same gas which Priestley observed. Lavoisier finally concluded that the gas, whichhe called oxygen, combines with combustible materials when they burn. This process iscalled oxygen theory of burning, which is now the accepted explanation for burning.2.

Q.1:- Answer:- (c):- Open-mindness. Explanation:-Creative Insights. A scientist with an open mind is…

Answered: Priestly shared with Lavoisier his…

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

Problem 1LR

Related questions

Question

100%

Priestly shared with Lavoisier his discovery of a “perfect air”. Which of the scientific traits did Priestly exhibit in this paragraph ? Choose one trait only. How is the trait used in science?

A. patience

B. gratitude

C. open-mindedness

D. acceptance of failure

State the problem that Lavoisier decided to investigate.
State the Hypothesis
Which paragraph described the experiment that Lavoisier performed to test his hypothesis? Give only the number of the paragraph.

5. In paragraph number 6 why did air rush into the vessel when Lavoisier broke the glass seal?

6. Which paragraph shows Lavoisier’s INTERPRETATION of his OBSERVATIONS. Give only the number of the paragraph.