Question

How much heat is required to change a 48.4 g ice cube from ice at -11.5°C to water at 72°C? (if necessary, use cice=2090 J/kg°C and csteam= 2010 J/kg°C)

How much heat is required to change a 48.4 g ice cube from ice at -11.5°C to steam at 116°C?

Answer #1

a) The heat needed is the sum of the following terms:

Qneeded = heat to reach melting point + heat to melt + heat to
reach melting point 63 C

Thus we have

Qneeded = 0.0484 [2090*11.5 + 3.33*10^5 + 4186*72]

= 31867.86J

b)

Qneeded = heat to reach melting point + heat to melt + heat to
reach melting point 72 C+ heat to vaporize + heat to reach 116
C

Thus we have

Qneeded = 0.0484 [2090*11.5 + 3.33*10^5 + 4186*100 + 2.26*10^6 +
2010*15 ]

= 148383.994 J

= 1.483 * 10^5 J

1. How much heat is required to change a 32.3 g ice
cube from ice at -10.6°C to water at 47°C? (if necessary, use
cice=2090 J/kg°C and csteam= 2010 J/kg°C)
2. How much heat is required to change a 32.3 g ice
cube from ice at -10.6°C to steam at 111°C?

Part A:
How much heat is required to change a 37.9 g ice cube from ice
at -14.1°C to water at 30°C? (if necessary, use cice=2090 J/kg°C
and csteam= 2010 J/kg°C)
Part B:
How much heat is required to change a 37.9 g ice cube from ice
at -14.1°C to steam at 112°C?

A) How much heat is required to change a 44.4 g ice cube from
ice at -13.2 degrees Celsius to water at 80 degrees Celsius? (If
necessary, use c of ice= 2090 J/kg degrees Celsius and c of steam=
2010 J/ kg degrees Celsius) B) How much heat is required to change
a 44.4 g ice cube from ice at -13.2 degrees Celsius to steam at 117
degrees Celsius?

How much energy is required to change a 23 g ice cube from ice
at − 12 ◦ C to steam at 101 ◦ C? The specific heat of ice is 2090 J
/ kg · ◦ C and of water 4186 J / kg · ◦ C. The latent heat of
fusion of water is 3 . 33 × 10^5 J / kg, its latent heat of
vaporization is 2 . 26 × 10^6 J / kg, and the...

How much energy is required to change a 34 g ice cube from ice
at −10◦C to steam at 119◦C? The specific heat of ice is 2090 J/kg ·
◦ C, the specific heat of water is 4186 J/kg · ◦ C, the specific
heat of stream is 2010 J/kg · ◦ C, the heat of fusion is 3.33 × 105
J/kg, and the heat of vaporization is 2.26 × 106 J/kg. Answer in
units of J

17. How much heat is required to change the temperature of 50 g
of ice cube initially at - 30 0C to steam at 160
0C? (Express your answer in J){ specific heat of ice is
2090 J/kg 0C, that of water is 4186 J/kg 0C,
that of steam is 2010 J/kg 0C; Lf = 3.33 X 10 J/kg, Lv =
2.26 X 10 J/kg.}

How much energy is required to change a 40 g ice cube from ice
at -10 oC to steam at 110 oC?
cwater=4186 J kg-1 oC-1
cice=2090 J kg-1 oC-1
cvapor=2010 J kg-1 oC-1
Lf=3.3x105 J kg-1
Lv=2.26x106 J kg-1

How much energy is required to change a 35 g
ice cube from ice at ?7
?C to steam at 108?C?
The specific heat of ice is 2090 J/kg

How much energy is required to change a 55-g ice cube from ice
at 0°C to steam at 140°C? J

answer in J
How much energy is required to change a 36.0-g ice cube from ice
at -7.0°C to steam at 114°C?
__________ J

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