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Vanyuwa [196]
2 years ago
15

A 2.40 kg block of ice is heated with 5820 J of heat. The specific heat of water is 4.18 J•g^-1•C^-1. By how much will it’s temp

erature rise, assuming it does not melt?
Chemistry
1 answer:
MrMuchimi2 years ago
0 0

Answer: The temperature rise is 0.53^0C

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

Q=m\times c\times \Delta T

Q = Heat absorbed by ice = 5280 J

m = mass of ice = 2.40 kg = 2400 g   (1kg=1000g)

c = heat capacity of water = 4.18J/g^0C

Initial temperature  = T_i

Final temperature = T_f  

Change in temperature ,\Delta T=T_f-T_i=?

Putting in the values, we get:

5280J=2400g\times 4.18J/g^0C\times \Delta T

\Delta T=0.53^0C

Thus the temperature rise is 0.53^0C

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At 66.0 ∘c , what is the maximum value of the reaction quotient, q, needed to produce a non-negative e value for the reaction so
andreev551 [17]

Answer:

\boxed{5.5 \times 10^{-28}}

Explanation:

We must use the Nernst equation

E = E^{\circ} - \frac{RT}{zF}\ln Q

Step 1. Calculate E°

SO₄²⁻(aq) + 4H⁺(aq) + 2e⁻ ⇌ SO₂(g) + 2H₂O(ℓ)

<u>2Br⁻⇌ Br₂(aq) + 2e⁻                                                                </u>

SO₄²⁻(aq) + 4H⁺(aq) + 2Br⁻(aq) ⇌ Br₂(aq) + SO₂(g) + 2H₂O(ℓ)

E° = 0.17 - 1.0873 = -0.92 V

Step 2. Calculate Q

E   =  0      V

E° = -0.92 V

R = 8.314 J·K⁻¹mol⁻¹

T = 66 °C

n = 2

F = 96 485 C/mol

Calculations:  

T = 66.0 + 273.15 = 339.15 K

0 = -0.92 - \dfrac{8.314 \times 339.15}{2 \times 96 485}\ln Q\\\\0.92 = -0.0146\times \ln Q \\\\\ln Q = -\dfrac{0.92}{0.0146} = -62.8\\\\Q = e^{-62.8} =\boxed{5.5 \times 10^{-28}}\\

6 0
2 years ago
Total distance divided by total elapsed time gives what quantity?
ki77a [65]
<h2>Total distance divided by total elapsed time gives : Average speed </h2>

Explanation:

Speed

It is the distance traveled by body with respect to time .

Its formula is Speed = distance /time

V=S/T

units : m/sec or Km/hr

Distance

It is total path traveled by body in any direction .

It unit and symbol is : S  and unit = m /Km

Average speed

It is the total distance traveled by body with respect to total time taken to travel that given distance .

Average speed = total distance /total time

A.s = T.D/T.T

unit = m/sec or Km/hr

Instantaneous velocity

It is the distance traveled by body at particular instant of time ,in given direction .

Displacement

It is the shortest path traveled by body in given direction .

6 0
1 year ago
Given 6.00 moles Of ZnSO4, determine the mole of Ag2SO4​
SIZIF [17.4K]

Answer:

6 moles of ZnSO₄ produces 6 moles of  Ag₂SO₄ .

Explanation:

Given data:

Moles of ZnSO₄ = 6.00 mol

Moles of Ag₂SO₄ = ?

Solution:

Chemical equation:

2Ag + ZnSO₄   →  Ag₂SO₄  + Zn

Now we will compare the moles of ZnSO₄ and Ag₂SO₄.

                     ZnSO₄          :           Ag₂SO₄

                         1               :             1

                       6.00            :          6.00

So 6 moles of ZnSO₄ produces 6 moles of  Ag₂SO₄ .

7 0
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Yes because it can not go back to its previous state
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Give an example of oxidation reaction which can be a nuisance
Sergio039 [100]
An example of a nuisance, oxygen reacts with iron to form rust.
This reaction involves the addition of oxygen, which is not needed.

2Fe(s) + 2H2O(l) + O2 (g)---> 2Fe^+2 (aq) + 4OH- (aq)
8 0
1 year ago
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