Question

Some stainless steel implements, in a well insulated container, are brought into thermal equilibrium with 100...

Some stainless steel implements, in a well insulated container, are brought into thermal equilibrium with 100 g of steam (water vapour). Initially the steam was at a temperature of 1000C and the implements were at a temperature of 10oC.

Lv (water) = 2256 kJ kg-1; Cwater = 4.19 kJ kg-1 K-1; C stainless-steel = 0.9 kJ kg-1 K-1

Question:

Which ONE of the following statements transforming 100 g of steam at 1000C into 100 g of water at 1000C is FALSE?

A. Heat is transferred even though the temperature of the water and steam does not change.

B. In transforming to liquid water, 225.6 kJ of heat is extracted from the steam.

C. Liquid water can never be at the same temperature as steam.

D. The molecules in the steam are further apart on average than the molecules in the liquid.

E. The temperature at which the phase changes from steam to liquid water depends on the ambient air pressure.

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