Question

How much heat must be supplied to a 500.0g iron pan to raise its temperature from 20.0Cto 373.0K?

Answer #1

Heat that has to be supplied to increase the temparature from to is:

where, m is the mass in kg and C is the heat capacity of the iron metal.

Note: C can vary from 440 to 460 J/(kgK) depending on the iron metal purity. So, I assumed it with an average value of 450J/(kgK). In case, if the problem includes the C value, then that must be used as such.

The tempartures are given in and . So, one of them has to be converted to other units to match with same before to know the difference in temparature.

In order to rise the temperature by 80K i.e., to rise from 20C to 373K, one has to supply 18kJ heat energy to the iron pan.

How much heat must be supplied to a 500 g iron pan to increase
its temperature from 20 OC to 100 OC. The specific heat of iron is
c= 0.11 cal/g/OC

(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.

How much heat energy must be added to a 6.0-cm-diameter copper
sphere to raise its temperature from -50∘C to 170 ∘C?
The correct answer is Q=85kJ, but I do not know how to
solve.

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.

if a stove supplies the same amount of heat to both an iron pan
and a copper pan of equal masses, which pan will be at a higher
temperature after heating for 5 minutes?

How much heat transfer (in kJ) is necessary to raise the
temperature of 0.766 kg of ice from 0ºC to 32.6ºC? The specific
heat of water is 4186 J/kgºC and the heat of fusion for water is
334 kJ/kg.

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?

How much heat is required to raise the temperature of 230 g
CH3OH(l) from 22.0 to 30.0 ∘C and then vaporize it at 30.0 ∘C? Use
enthalpy of vaporization CH3OH(l) = 38.0 kJmol−1 and a molar heat
capacity of CH3OH(l) of 81.1 Jmol−1K−1.

(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 kJ) is necessary to raise the
temperature of a 0.210 kg piece of ice from −24.0°C to 134°C,
including the energy needed for phase changes? (Assume the
substance remains at a constant volume throughout each stage of the
heating process.)
kJ
(b)
How much time (in s) is required for each stage, assuming a
constant 20.5 kJ/s rate of heat transfer? (Enter your answers as a
comma-separated list. Enter your times in order from...

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