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

explanation: magnetic pole, region at each end of a magnet where the external magnetic field is strongest. the south-seeking pole, or any pole similar to it, is called a south magnetic pole. unlike poles of different magnets attract each other; like poles repel each other.

Answer from: Quest

are you like autistic or something?

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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.

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