Smoking a cigarette involves a combination of physical and chemical changes. The act of lighting the cigarette and burning the tobacco involves a chemical change, producing new substances. The process of inhaling and exhaling the smoke is a physical change as it involves a change in state (from solid to gas) without altering the chemical composition of the smoke.
It is a chemical change, even though the cigarette is getting physically smaller. When heat is added and you inhale the chemicals, the cigarette burns and you blow out smoke which in itself is a chemical reaction that cannot be reversed. Therefore, it's purely chemical. Remember that chemical changes cannot be reversed and physical changes can. Freezing water and then melting it is an example of a physical change. The example you mentioned is a chemical change. Hope this helps! - D.F
The chemical in marijuana that causes a high is called tetrahydrocannabinol (THC).
Nicotine, the addictive substance in cigarettes, makes up approximately 1-2% of the total weight of a cigarette.
Carbon monoxide is the chemical in cigarette smoke that reduces the ability of blood to carry oxygen. It binds to hemoglobin in red blood cells more readily than oxygen, displacing oxygen and impairing its transportation to tissues.
Heavy cigarette smoking causes about 80-90% of all emphysema cases
Cigarette smoking, on a chronic long-term basis, is the chief cause of emphysema (COPD, or chronic obstructive pulmonary disease). There are many other causes, including the various pneumoconioses.
Basically cigarette smoking
All types of smoke have tar, which gets into the lungs and causes emphysema and/or chronic bronchitis. The only difference between pipe smoke and cigar/cigarette smoke is that pipe smoke - in my opinion - smells better.
Smoking causes disease and is a slow way to die. The strain of smoking effects on the body often causes years of suffering. Emphysema is an illness that slowly rots your lungs. People with emphysema often get bronchitis again and again, and suffer lung and heart failure. Emphysema makes it difficult to breath and cannot be cured.
There is never a safe way to smoke a cigarette. Smoking causes a variety of health problems including lung cancer, emphysema, stroke, and bronchitis.
Emphysema is primarily caused by long-term exposure to irritants, such as cigarette smoke, air pollution, or industrial chemicals. These irritants cause inflammation and damage to the tiny air sacs in the lungs, leading to the characteristic symptoms of emphysema, such as breathlessness and coughing. Genetic factors can also play a role in the development of emphysema.
In 99% cases it is, as a major risk factor is cigarette smoking.
emphysema
The related link below will tell you everything about emphysema, causes and treatment.
its tar because of its sticky property
The exact causes is still not known but it is believed to be caused by inhalation of polutant. These stuffs cause immune reaction that somehow destroy your alveoli. And/or smoking can cause emphysema, weakening/eating away the thin skin tissue of your lungs.