Question

What quantity of heat is needed to convert 5 kg of ice at -19 degrees C to steam at 100 degrees C?

**Heat = 13590000 Joules -wrong**

Answer #1

Mass of ice = m = 5 kg

Initial temperature of ice = T_{1} = -19
^{o}C

Melting point of ice = T_{2} = 0 ^{o}C

Boiling point of water = T_{3} = 100 ^{o}C

Specific heat of ice = C_{1} = 2100
J/(kg.^{o}C)

Specific heat of water = C_{2} = 4186
J/(kg.^{o}C)

Latent heat of fusion of water = L_{1} = 3.34 x
10^{5} J/kg

Latent heat of vaporization of water = L_{2} = 2.26 x
10^{6} J/kg

Heat needed to convert the ice from -19^{o}C to steam at
100^{o}C = H

H = mC_{1}(T_{2} - T_{1}) +
mL_{1} + mC_{2}(T_{3} - T_{2}) +
mL_{2}

H = (5)(2100)(0 - (-19)) + (5)(3.34x10^{5}) +
(5)(4186)(100 - 0) + (5)(2.26x10^{6})

H = 1.526 x 10^{7} J

Heat needed to convert 5 kg of ice at -19^{o}C to steam
at 100^{o}C = 1.526 x 10^{7} J

What is the minimum amount of heat, in Joules, needed to fully
convert a 1-kg block of ice at 250 K to steam?
cice = 2090 J/kg-°C , cwater = 4186 J/kg-°C ,
csteam = 2010 J/kg-°C,
Lfushion-water 3.33x105 J/kg,
Lvaporization-water = 2.26x106
J/kg

How much heat is needed to convert 10 kg of water at 30◦C
to:
(a) water at 100◦C?
(b) steam?
(c) ice?
Take:
Specific heat capacity of water = 4.186 kJ/kg◦C
Latent heat of vaporization of water = 2264 kJ/kg
Latent heat of fusion of water = 333 kJ/kg.

What quantity of energy does it take to convert 0.200 kg ice at
–20.°C to steam at 250.°C? Specific heat capacities: ice, 2.03
J/g·°C; liquid, 4.2 J/g·°C; steam, 2.0 J/g·°C; = 40.7
kJ/mol; = 6.02 kJ/mol.
What is the energy in kJ

How
much heat is needed to bring 30 kg of ice at -8 degrees celsius to
steam at 125 degrees celsius?

A.) How much heat is required to convert 15.0 g of ice at -13.0
∘C to steam at 100.0∘C ? Express your answer using three
significant figures. (Joules)
B.)How much heat is required to convert 15.0 g of ice at -13.0
∘C to steam at 100.0∘C? Express your answer using three significant
figures. (kcal)

determine the heat necessary to convert 3.00kg of
steam at 150 degrees Celsius into ice at -10 degrees Celsius

How much heat is needed to convert 1 kg of ice at 0C to 1 kg of
water vapor at 100C?

How much heat(in kJ) is required to convert a 20g ice cube at
-15 degrees C into water vapor at 100 degrees C?

how much heat is needed to change 0.5 kg of ice at -20°C into
steam of 120°?

I have 1.2 kg of ice at 0oC. How much heat is
required to convert this ice to 100oC steam?
options:

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