作者yangway (休斯)
看板Chemistry
標題[請益]物理化學 標準生成能跟焓
時間Mon Feb 21 19:12:28 2011
題目:
A sample of potassiun(K,atomic weight =23) of mass 2.140g undergoes
combustion in a constant-volume calorimeter with a calorimeter constant
1849 J/K at room temperature,After the reaction completes, the temperature
and inner water bath that contains 1450g of water increases by 2.62K (1cal=
4.184J)
求標準生成能 跟 標準生成焓 for K2O
物化不好,完全不知道怎麼算,想請各位指點一下。
我只會算 1450*2.62*4.184=15895J <讓水上升2.62K所需要的J)
之後就卡住了。
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1F:推 choke:這不是今年台聯考的題目嗎@@ 02/22 00:05
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