Question

How much heat is required for the following:

a) Raise the temperature from -10°C to 0°C for a 50kg block of ice.

b) Melt the ice to water

c)Heat the water to 100°C.

d) Evaporate all the water.

e) Compute the total heat supplied.

Answer #1

A 60 kg block of ice begins at -60 degrees the specific heat of
ice is 2090 j/(kg)C. The latent heat of fusion of water is 3.3 x
10^5 and the latent heat of vaporization is 2.3 x 10^6 J/kg. How
much energy is required to heat the ice to 0 degrees Celcius
(melting point)?
How much energy is required to heat the ice from -50C to the
melting point and melt the ice?
How much energy is required to...

How much heat is required to raise the temperature of 20.9 g20.9
g of water from −25 °C−25 °C to 155 °C? the answer are not 1.45
*10^5 and 10.956778 ! you have to calculate be broken 1.down into
five step! heart the ice from -25 c to 0 c
2.melting the ice
3.heating the liquid water from 0c to 100 c
4.100 c to 155 c
0.497 cal/ g c to do this calculate
All this answer 12298.782 and...

(a) How much heat is required to raise by 13.20°C the
temperature of 1.7 kg of water.
(b) How much heat is required to raise by 13.20°C the
temperature of 1.7 kg of iron.

An ice bag containing 0°C ice is much more effective in
absorbing heat than one containing the same amount of 0°C
water.
(a)
How much heat (in J) is required to raise the temperature of
0.800 kg of water from 0°C to 32.0°C?
J
(b)
How much heat (in J) is required to first melt 0.800 kg of 0°C
ice and then raise its temperature?
J
(c)
Explain how your answers support the contention that the ice is
more effective....

4. In total, how much heat is required to raise the temperature
of a 450 g sample of water (c = 4.18 J/oC.g) in a saucepan that has
a heat capacity of 300 J/oC from 200C to 75oC?

suppose the specific heat of ice and water is 0.49 cal/g. C ( C
represent degree Celsius) and 1.0 cal/g. C. the latent heat of
fusion of water is 80 cal/g. how much heat (in calories) is
required for 100 grams of ice with an initial temperature of -10 C
to a. raise the ice's temperature to the melting point? b. then
completely melt the ice to water? c. finally, raise the water's
temperature to 50 C?

How much heat is required to convert 5.0 kg of ice from a
temperature of - 10 C to water vapor at a temperature of 220 F?

(a) How much energy is needed to raise 1.00 kg of liquid water
from 19.9 ?C to 99.9 ?C? (b) How much energy is needed to evaporate
1.00 kg of liquid water (at 100?C) into steam (at 100?C)? Be
careful not to confuse J with kJ. (c) Is the relative size of these
two numbers consistent with everyday experience that it takes much
longer (e.g. maybe an hour or so) to boil away an entire pot of
water than it...

(a)
How much heat transfer (in kcal) is required to raise the
temperature of a 0.550 kg aluminum pot containing 3.50 kg of water
from 25.0°C to the boiling point and then boil away 0.650 kg of
water?
(b)
How long (in s) does this take if the rate of heat transfer is
600 W (1 watt = 1 joule/second (1 W = 1 J/s))?

(a)
How much heat transfer (in kcal) is required to raise the
temperature of a 0.600 kg aluminum pot containing 2.00 kg of water
from 40.0°C to the boiling point and then boil away 0.850 kg of
water?
kcal
(b)
How long (in s) does this take if the rate of heat transfer is
600 W (1 watt = 1 joule/second (1 W = 1 J/s))?
s

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