LIQUEFIED PETROLEUM GAS (LPG) IN USED IN COOKING. UNDER SUFFICIENT PRESSURE IN THE CYLINDER,IT IS STORED AS A LIQUID AND WHEN THE PRESSURE IS LOWERED,IT COMES OUT AS GAS (CHANGE A) THEN THE GAS BURNS WHEN IT IS LIT (CHANGE B).CLASSIFY A AND B AS CHEMICAL OR PHYSICAL CHANGES AND ADD A SHORT NOTE WHY.
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-------------It is a chemical change
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THIS CHANGE IS CHEMICAL CHANGE. AS ACCORDING TO THE QUESTION, IN THE (CHANGE A), IT COMES OUT AS GAS BECAUSE THE LPG NEEDS ONLY LOW PRESSURE OR REFRIGERATION TO CHANGE IT INTO LIQUID FROM ITS GASEOUS STATE AND THEN IN THE (CHANGE B), IT LITS BECAUSE THE LIQUID IS CHANGED TO GASEOUS STATE AND THE GAS BURNS.
NOTE THAT THIS CHANGE INVOLVES CHANGES IN THE CHEMICAL PROPERTIES.
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