Question

Suppose that 23 g of each of the following substances is initially at 26.0 ∘C. What is the final temperature of each substance upon absorbing 2.25 kJ of heat?

For:

a) gold

b) silver

c) aluminum

d) water

Answer #1

We will use the equation Q = m*c_{p}*T where Q is
the heat supplied, c_{p} is specific heat capacity and
T is the change
in temperature.

Q = 2.25 kJ = 2.25 kJ * 1000 J/kJ = 2250 J, m = 23g

a) For gold, c_{p} = 0.129 J/g ^{}C.
Substitute the values for Q, m and cp in the equation, we get
T = 758.34
^{}C =
T_{final} - 26 ^{}C.

T_{final} = 758.34 + 26 ^{}C = 784.34
^{}C.

b) Similarly for Silver, c_{p} = 0.240 J/g
^{}C.

T = 407.6
^{}C.
T_{final} = 407.6 + 26 ^{}C = 433.6
^{}C.

c) For Aluminum, c_{p} = 0.9 J/g ^{}C.

T = 108.7
^{}C.
T_{final} = 108.7 + 26 ^{}C = 134.7
^{}C.

d) For water, c_{p} = 4.184 J/g ^{}C.

T = 23.38
^{}C.
T_{final} = 23.38 + 26 ^{}C = 49.38
^{}C.

Suppose that 28 g of each of the following substances is
initially at 26.0 ∘C. What is the final temperature of each
substance upon absorbing 2.35 kJ of heat? Express your
answer using two significant figures.
a) gold
b) silver
c) aluminum
d) water
Please anser all parts.

Suppose that 23 g of each of the following substances is
initially at 25.0 ∘C. What is the final temperature of each
substance upon absorbing 2.30 kJ of heat? Express your answer using
two significant figures. a). gold b). silver c). aluminum d).
water

Suppose that 27 g of each of the following substances is
initially at 28.0 ∘C. What is the final temperature of each
substance upon absorbing 2.40 kJ of heat?
a) Gold
b) silver
c) aluminum
d) water

A 25 g gold nugget with an initial temperature of 60 °C is
dropped into an insulated cup containing 100 ml of water initially
at a temperature of 5°C. What is the final temperature after
thermal equilibrium is established?
Table 3.4 Specific Heat Capacities of Some Common Substances
Substance Specific Heat Capacity (J/g °C) Lead 0.128 Gold 0.128
Silver 0.235 Copper 0.385 Iron 0.449 Aluminum 0.903 Ethanol 2.42
Water 4.184

An unknown mass of each of the following substances, initially
at 22.0 ∘C, absorbs 1970 J of heat. The final temperature is
recorded as indicated. Find the mass of each substance.
a. Pyrex glass (Tf= 55.7 ∘C)
sand (Tf= 62.1 ∘C)
ethanol (Tf= 44.4 ∘C)
water (Tf= 32.2 ∘C)

The following table lists the specific heat capacities of select
substances: Substance Specific heat capacity [J/(g⋅∘C)] silver
0.235, copper 0.385, iron 0.449, aluminum 0.903, ethanol 2.42,
water 4.184, Water (2430 g ), is heated until it just begins to
boil.
If the water absorbs 5.07×105 J of heat in the process, what was
the initial temperature of the water? Express your answer with the
appropriate units.

Two substances, A and B, initially at different temperatures,
come into contact and reach thermal equilibrium. The mass of
substance A is 6.07 g and its initial temperature is 20.8 ∘ C . The
mass of substance B is 25.0 g and its initial temperature is 52.3 ∘
C . The final temperature of both substances at thermal equilibrium
is 46.6 ∘ C . If the specific heat capacity of substance B is 1.17
J/g ⋅ ∘ C , what...

Two substances, A and B, initially at different temperatures,
come into contact and reach thermal equilibrium. The mass of
substance A is 6.11 g and its initial temperature is 20.8 ∘C. The
mass of substance B is 25.9 g and its initial temperature is 52.1
∘C. The final temperature of both substances at thermal equilibrium
is 46.5 ∘C.
If the specific heat capacity of substance B is 1.17 J/g⋅∘C,
what is the specific heat capacity of substance A?

Two substances, A and B, initially at different temperatures,
come into contact and reach thermal equilibrium. The mass of
substance A is 6.40 g and its initial temperature is 20.9 ∘C. The
mass of substance B is 25.8 g and its initial temperature is 52.4
∘C. The final temperature of both substances at thermal equilibrium
is 47.0 ∘C.
I
If the specific heat capacity of substance B is 1.17 J/g⋅∘C,
what is the specific heat capacity of substance A?

14
An unknown mass of each of the following substances, initially
at 21.0 ∘C, absorbs 1950 J of heat. The final temperature is
recorded as indicated. Find the mass of each substance.
Part A
a. Pyrex glass (Tf= 55.7 ∘C)
Express your answer using two significant figures.
m=
g
SubmitMy AnswersGive
Up
Incorrect; Try Again; 2 attempts remaining; no points
deducted
Part B
sand (Tf= 62.0 ∘C)
Express your answer using two significant figures.
m=
g
SubmitMy AnswersGive
Up
Part...

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