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Surface Tension

At 0^° C, ice...

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At 0^° C, ice and water are in equilibrium and△ Hfusion of ice is 6 kJ/mol. Correct among the following is/are (1) △ G =△ S =0,(2) △ SSurr=-21.98J/K ,(3) △ G =0 ,(4) Both (2) & (3)

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0^{\circ} C

, ice and water are in equilibrium and enthalpy change for the process

H_{2} O_{(s)} ⇌ H_{2} O_{(l)} i s 6.0 k J m o l^{- 1}

. The entropy change for the conversion of ice into liquid water is

10 g

20^{0} C

10 g

50^{0} C

. The amount of ice and water, present at equilibrium, are respectively

60 g

0^{0}

60 g

100^{0}

. At thermal equilibrium, the mixture contains:(Latent heats of steam and ice are

540 c a l g^{- 1}

80 c a l g^{- 1}

respectively, specific heat of water

= 1 c a l g^{- 1}^{- 1}

)

0^{0} C

, ice and water are in equilibrium and

Δ H^{0} = 6.00 k J / m o l

for the process

H_{2} O (s) ⇋ H_{2} O (l)

Δ S^{0}

for the conversion of ice to liquid water is:

Q. The enthalpy of fusion of ice is

6.02 k J m o l^{- 1}

. The heat capacity of water is

4.18 J g^{- 1} C^{- 1}

. What is the smallest number of ice cubes at

0^{\circ} C

, each containing one mole of water, that are needed to cool

500 g

of liquid water from

20^{\circ} C

0^{\circ} C

.

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