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mr Goodwill [35]
3 years ago
14

Write the balanced equation for each of the following changes and identify whether heat is a product or needed to start the reac

tion (do not include 'heat' in your balanced equation, simply identify whether it is a product or reactant):
(a) the sublimation of dry ice [conversion of CO2(s) directly to CO2(g)] Heat is a product and is given off by the reaction. Heat is a reactant and is needed to start the reaction.
(b) the reaction of 1 mol of sulfur dioxide with oxygen. Heat is a reactant and is needed to start the reaction. Heat is a product and is given off by the reaction.
Chemistry
1 answer:
storchak [24]3 years ago
5 0

Explanation:

(a) the sublimation of dry ice [conversion of CO2(s) directly to CO2(g)]

The balanced equation is given as;

CO2(s) --> CO2(g)

This reaction is endothermic, hence; Heat is a reactant and is needed to start the reaction.

(b) the reaction of 1 mol of sulfur dioxide with oxygen.

The balanced equation is given as;

2SO2 + O2 --> 2SO3

This reaction is exothermic, hence; Heat is a product and is given off by the reaction.

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Please help quick
Rama09 [41]

Answer:

c = 0.898 J/g.°C

Explanation:

1) Given data:

Mass of water = 23.0 g

Initial temperature = 25.4°C

Final temperature = 42.8° C

Heat absorbed = ?

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Specific heat capacity of water is 4.18 J/g°C

ΔT = 42.8°C - 25.4°C

ΔT = 17.4°C

Q = 23.0 g ×  × 4.18 J/g°C × 17.4°C

Q = 1672.84 j

2) Given data:

Mass of metal = 120.7 g

Initial temperature = 90.5°C

Final temperature = 25.7 ° C

Heat released = 7020 J

Specific heat capacity of metal = ?

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 25.7°C - 90.5°C

ΔT = -64.8°C

7020 J = 120.7 g ×  c ×  -64.8°C

7020 J = -7821.36 g.°C ×  c

c = 7020 J / -7821.36 g.°C

c = 0.898 J/g.°C

Negative sign shows heat is released.

7 0
3 years ago
In a chemical equation, the new substance that is produced from a chemical reaction is called __________.
aleksandrvk [35]

Answer:

products

Explanation:

yeah the answer is product

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3 years ago
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Answer: D. It Increases reaction rates.

Explanation:

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Answer:

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Explanation:

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5.28/290 = P'/296 Multiply both sides by 296

1562.88/290 = P'

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