Transcript Specific Heat Practice File

SPECIFIC HEAT
PRACTICE
Q = mcΔT
Problem #1
• How many joules of heat are
needed to raise the
temperature of 40.0 g of
aluminum from 20°C to 58°C,
if the specific heat of aluminum
is 0.90 J/g°C?
Problem #2
• When a 140 g sample of
aluminum (Al) absorbs 9612 J
of energy, its temperature
increases from 25oC to 105oC.
Find the specific heat of
aluminum.
Problem #3
• A 19.75-g piece of iron absorbs
1086.75 joules of heat energy,
and its temperature changes
from 25°C to 155°C. Calculate
the specific heat capacity of
iron
Problem #4
• A certain mass of water was
heated with 41,870 Joules,
raising its temperature from
21.0 °C to 38.5 °C. Find the
mass of the water, in grams.
(Cp of H2O = 4.184 J/g °C)
Problem #5
• How many joules of heat are
needed to change 60.0 grams
of ice at -12.0 °C to steam at
120.0 °C?
• (Cp of H2O = 4.184 J/g °C)
Problem #6
• A certain mass of water was
heated with 41,870 Joules,
raising its temperature from
21.0 °C to 38.5 °C. Find the
mass of the water, in grams.
(Cp of H2O = 4.184 J/g °C)
Problem #7
• Calculate the number of joules
given off when 37.0 grams of
steam cools from 120.0 °C to
ice at -20.0 °C.
• (Cp of H2O = 4.184 J/g °C)
Problem #8
• The specific heat of ethanol is
2.46 J/g oC. Find the heat
required to raise the
temperature of 173 g of ethanol
from 19oC to 45oC
Practice #8
•The specific heat of
aluminum is 0.88 J/g ⁰C.
How many joules will it take
to make the temperature of a
50 g nugget to go up from 20
⁰C to 70⁰C?
Practice #9?
•How much heat is
needed to warm 0.52
kg of gold from 30 ⁰C
to 120 ⁰C? (cp = 136
J/kg ⁰C)
Practice #10
•If it takes 820 Joules of
heat to warm a sample of
zinc from 0 ⁰C to 50 ⁰C,
what would be the mass
of zinc? (cp= 380 J/kg ⁰C)
Practice #11
•What is the specific
heat of silver if an 80.0
g sample is heated
from 24.0 ⁰C to 49.0 ⁰C
by adding 468.2J?
Practice #12
•The specific heat of iron is
0.46 J/g ⁰C. How many
joules of heat will it take to
make the temperature of a
150 g bar go up from 25 ⁰C
to 60 ⁰C?
Practice #13
•What is the specific
heat of copper if a 75 g
sample is heated from
20 ⁰C to 24 ⁰C by
adding 117 J?
Practice #14
•A 9.5 kg copper sculpture
heats up during the day
from 24 ⁰C to 78 ⁰C. How
much energy was
absorbed? (cp = 390 J/kg
⁰C)
Practice #15
•What would be the
specific heat of a material
that takes 310 joules of
energy to warm 40 kg
from 50 ⁰C to 65 ⁰C?