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SashulF [63]
4 years ago
8

When Carmen plays basketball, the energy she needs originally came from other sources. Which of the following sentences is NOT t

rue about this scenario?
a. Energy from the sun is transformed into chemical energy in plants.

b. Solar energy is transformed into kinetic energy and thermal energy.

c. Chemical energy is transformed into kinetic and thermal energy in her body.

d. Energy is conserved in these transformations of one kind of energy into another.
Chemistry
2 answers:
NeTakaya4 years ago
4 0
Bis the correct answer have a nice day sweetie
Vinvika [58]4 years ago
3 0

Answer:

your answer is C.

pls mark brainliest

Explanation:

You might be interested in
A typical double bond __________________________. a. is stronger and shorter than a single bond b. consists of one σ bond and on
leva [86]

Answer:

All of the above answers are correct.

Explanation:

Double bonds are stronger that single bonds because they have both sigma and pi bonds whereas single bonds contain only sigma bond. They also involve the sharing of electron pairs and heavily imparts rigidity to a molecule.

5 0
3 years ago
This is due tomorrow... :How can you tell the mass was conserved in a chemical reaction?
kipiarov [429]

Answer:

Matter cannot be created or destroyed in chemical reactions. This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions.

Explanation:

hope this help :)

3 0
3 years ago
Can somebody please help me asap !!!
EastWind [94]

Answer:

Option A. 1191.49 K

Explanation:

Data obtained from the question include:

The equation for the reaction is given below:

4HCl + O2 —> 2Cl2 + 2H2O

Enthalpy (H) = +280 KJ/mol = +280000 J/mol

Entropy (S) = +235 J/Kmol

Temperature (T) =..?

The temperature at which the reaction will be feasible can be obtained as follow:

Change in entropy (ΔS) = change in enthalphy (ΔH)/T

(ΔS) = (ΔH)/T

235 = 280000/T

Cross multiply

235 x T = 280000

Divide both side by 235

T = 280000/235

T = 1191.49 K

Therefore, the temperature at which the reaction will be feasible is 1191.49 K

4 0
4 years ago
I2(g) + Cl2(g)2ICl(g) Using standard thermodynamic data at 298K, calculate the entropy change for the surroundings when 1.62 mol
galina1969 [7]

Answer:

The change in entropy of the surrounding is -146.11 J/K.

Explanation:

Enthalpy of formation of iodine gas = \Delta H_f_{(I_2)}=62.438 kJ/mol

Enthalpy of formation of chlorine gas = \Delta H_f_{(Cl_2)}=0 kJ/mol

Enthalpy of formation of ICl gas = \Delta H_f_{(ICl)}=17.78 kJ/mol

The equation used to calculate enthalpy change is of a reaction is:  

\Delta H_{rxn}=\sum [n\times \Delta H_f(product)]-\sum [n\times \Delta H_f(reactant)]

For the given chemical reaction:

I_2(g)+Cl_2(g)\rightarrow 2ICl(g),\Delta H_{rxn}=?

The equation for the enthalpy change of the above reaction is:

\Delta H_{rxn}=[(2\times \Delta H_f_{(ICl)})]-[(1\times \Delta H_f_{(I_2)})+(1\times \Delta H_f_{(Cl_2)})]

=[2\times 17.78 kJ/mol]-[1\times 0 kJ/mol+1\times 62.436 kJ/mol]=-26.878 kJ/mol

Enthaply change when 1.62 moles of iodine gas recast:

\Delta H= \Delta H_{rxn}\times 1.62 mol=(-26.878 kJ/mol)\times 1.62 mol=-43.542 kJ

Entropy of the surrounding = \Delta S^o_{surr}=\frac{\Delta H}{T}

=\frac{-43.542 kJ}{298 K}=\frac{-43,542 J}{298 K}=-146.11 J/K

1 kJ = 1000 J

The change in entropy of the surrounding is -146.11 J/K.

4 0
3 years ago
write the balanced chemical equation for the following word equation. sodium+sulphate Acidsodium sulphate +hydrogen​
Oksanka [162]

Answer:

<em>2NaOH+ H2SO4 → Na2SO4 + 2H2O</em>

<h3>I HOPE ITS RIGHT IF NOT THEN SORRY</h3>

HAVE A GREAT DAY :)

7 0
3 years ago
Read 2 more answers
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