In a container of negligible heat capacity, mix 6kg of ice at -40 ° C with 3kg of steam at 120 ° C, determine the equilibrium temperature.

100°C

Explanation:

The heat gained by the ice equals the heat lost by the steam, so the total heat transfer equals 0.

Heat lost by the steam as it cools to 100°C:

q = mCΔT

q = (3 kg) (2.00 kJ/kg/K) (100°C − 120°C)

q = -120 kJ

Total heat so far is negative.

Heat lost by the steam as it condenses:

q = -mL

q = -(3 kg) (2256 kJ/kg)

q = -6768 kJ

Heat absorbed by the ice as it warms to 0°C:

q = mCΔT

q = (6 kg) (2.11 kJ/kg/K) (0°C − (-40°C))

q = 506.4 kJ

Heat absorbed by the ice as it melts:

q = mL

q = (6 kg) (335 kJ/kg)

q = 2010 kJ

Heat absorbed by the water as it warms to 100°C:

q = mCΔT

q = (6 kg) (4.18 kJ/kg/K) (100°C − 0°C)

q = 2508 kJ

The total heat absorbed by the ice by heating it to 100°C is 5024.4 kJ.

If the steam is fully condensed, it loses a total of -6888 kJ.

Therefore, the steam does not fully condense.  The equilibrium temperature is therefore 100°C

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explanation:

wind is defined by the direction it blows from.   for example, a wind blowing from north to south is called a northerly wind.

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​