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From personal experience, describe whether these processes are endothermic or exothermic. Give a reason for each.
a. A charcoal briquette burns.
b. Ice melts.
c. Water evaporates from your skin.
d. Wood burns.
Answer:
a. Exothermic. A charcoal briquette releases heat as it burns.
b. Endothermic. Water absorbs the heat essential for evaporation from your skin, and your skin feels cooler.
c. Endothermic. Ice absorbs the essential heat from the environment to melt.
d. Exothermic. Wood releases heat as it burns.
if insoluble residues are found after the microwave digestion with nitric acid, how to improve?
Effect of substituent on acidic nature (a) An electron withdrawing substituent that is - I effect stabilizes the anion by dispersing the negative charge and hence increases the
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P= 10.5atm v= 2.06L T= 298K p= 5.21atm v= 6.15 t= ? what is t?
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