The molar heat capacity of water at constant pressure, C, is `75 JK^(-1) mol^(-1)`. When 1.0 kJ of heat is supplied to 100 g water which is free to expand, the increase in temperature of water is :A. 4.8 KB. 6.6 KC. 1.2 KD. 2.4 K

The molar heat capacity of water at constant pressure, C, is `75 JK^(-

1.	The molar heat capacity of water at constant pressure, C, is `75 JK^(-1) mol^(-1)`. When 1.0 kJ of heat is supplied to 100 g water which is free to expand, the increase in temperature of water is :A. 4.8 KB. 6.6 KC. 1.2 KD. 2.4 K
Answer» Correct Answer - D According to heat capacity rule capcaity rule. `q=mcDeltaT, c=(q)/(m(T_(2)-T_(1))` Given that , `c=75 JK^(-1) "mol"^(-1)` `q=10 KJ = 1000 J` Mass= 100 g water Molar mass of water =18 g `75=(1000)/(5.55xxDeltaT)" "` (Number of moles `=(100)/(18)=5.55)` `therefore DeltaT=(1000)/(5.55xx75)=2.4 K`

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The molar heat capacity of water at constant pressure, C, is `75 JK^(-1) mol^(-1)`. When 1.0 kJ of heat is supplied to 100 g water which is free to expand, the increase in temperature of water is :A. 4.8 KB. 6.6 KC. 1.2 KD. 2.4 K

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