HY A) HX is the strongest acid and HY is the weakest acid. B) HY is the stronges
ID: 694006 • Letter: H
Question
HY A) HX is the strongest acid and HY is the weakest acid. B) HY is the strongest acid and HX is the weakest acid. C) HY is the strongest acid and HZ is the weakest acid. D) HZ is the strongest acid and HY is the weakest acid. 23. 10.0 g of a metal, initially at 25°C, are placed into 10.0 g of water, initially at 100°C. Which metal will have the highest final temperature? Shown after each metal is its specific heat in A) aluminum (0.902) B) copper (0.385) C) gold (0.129) D) iron (0.450) 24 Given: 4 N02(g) + O2(g) 2 N205(g)Explanation / Answer
Specific heat of water= 4.184 J/gm.deg.c, let the final temperature be t
Heat lost by water= mass of water* specific heat of water* change in the temperature
=10*4.184*(100-t)
Heat gained by metal= 10*Cp*(t-25)
At equilibrium, heat lost by water= heat gained by metal
=41.84*(100-t)= 10Cpt-250CP
41.84*100+250Cp = 10Cpt+41.84t
(4184+25CP)/(100Cp+41.84)= t
For aluminium, Cp =0.902 J/gm.deg.c, t = (4184+25*0.902)/(100*0.902+41.84), t= 31.85 deg.c
For Copper, CP= 0.385 J/gm.deg.c, t= (4184+25*0.385)/(100*0.385+41.84)= 52.2 deg.c
For gold, CP=0.129 J/gm.deg.c, t= (4184+25*0.129)/ (100*0.129+41.84)= 76.5 deg.c
For iron, CP=0.45 j/gm.deg.c, t= (4184+25*0.45)/(100*0.45+41.84) =48.3
The metal having lowest Cp, gold will have highest final temperature.
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