Physics, 27.11.2019 06:31 yomamafart7

A(10.0+a) g ice cube at -15.0oc is placed in (125+b) g of water at 48.0oc.

find the final temperature of the system when equilibrium is reached.

ignore the heat capacity of the container and assume this is in a calorimeter, i. e. the system is thermally insulated from the surroundings.

give your answer in oc with 3 significant figures.

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Answer from: yasmin7813

$T_{f}$ = 38.0° C

Explanation:

The thermal transfer processes are governed by two equations one for there is a change of state, during this process the temperature does not change and another for which there is a change of temperature.

Q = ± m L

Q = m $c_{e}$ ΔT

In calorimetric processes the heat transferred is equal to the heat absorbed by the system

-Qc = Qabs

Let's apply these equations to our system, we will assume the quantity A and B zero, reduce the magnitudes to the SI system

m1 = 10 g = 0.010 kg

m2 = 125 g = 0.125 kg

$c_{e}$ (ice) = 2090 J / kg ºC

$c_{ew}$ (water) = 4186 J / kg ºC

Lf = 3.33 105 J / kg

Let's write the expression for the heat given

Qc = m₂ $c_{ew}$ (T₀ - $T_{f}$ )

Qc = 0.125 4186 (48.0 - $T_{f}$ )

Qc = 523.25 (48.0 - $T_{f}$ )

The expression for absorbed is

Qabs = Q1 + Q2 + Q3

calculate Q₁

Q₁ = m $c_{e}$ ( $T_{f}$ - T₀)

Q₁ = 0.010 2090 (0 - (-15.0))

Q₁ = 313.5 J

Let's change state from ice to liquid water

Q₂ = + mL

Q₂ = 0.010 3.33 105

Q₂ = 3.33 103 J

Now let's heat the liquid water to the equilibrium temperature

Q₃ = m₁ $c_{ew}$ ( $T_{f}$ -T₀)

Q₃ = 0.01 4186 ( $T_{f}$ - 0)

Q₃ = 41.86 $T_{f}$

let's calculate the maximum heat assigned

Qc = 0.125 4186 (48.0 - 0)

Qc = 2.5 104 J

Qc> (Q₂ + Q₁)

all the ice is melted

523.25 (48.0 - $T_{f}$ ) = Q1 + Q2 + 41.86 $T_{f}$

(41.86 +523.25) $T_{f}$ = 523.25 48 - Q1 -Q2

565.11 $T_{f}$ = 25116 - 313.5 - 3.33 103

$T_{f}$ = 21469.5 / 565.11

$T_{f}$ = 38.0 ° C

Answer from: Quest

i just did an experiment like this in my science class. also the answer is yes, it will get separated because they are two opposites meaning if they are opposite they can not attract.

hope this .!

Answer from: Quest

Ithink c because you have to work to become goid

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A(10.0+a) g ice cube at -15.0oc is placed in (125+b) g of water at 48.0oc.

find the fin...

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