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antiseptic1488 [7]
3 years ago
9

State the relationship between phase changes and heat energy. In complete sentences

Chemistry
2 answers:
Harman [31]3 years ago
8 0
Changes in phase from solid to liquid (melting) and from liquid to gas (boiling) require energy. When solid ice melts and becomes a liquid, the particles of the substance move farther apart and heat energy is gained. When water boils, if forms steam (a gas).
zmey [24]3 years ago
8 0

Answer:

heat changes energy is by the sun

the sun gives off energy

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Given the partial equation: VO2++ Mn2+ → VO2++ MnO4−, balance the reaction in acidic solution using the half-reaction method and
bezimeni [28]

Answer:

Mn^2+(aq) + 4H2O(l) + 5[VO2]^+(aq) + 10H^+(aq) ---------->MnO4^-(aq) + 8H^+(aq) + 5[VO]^2+(aq) + 5H2O(l)

Explanation:

Oxidation half equation:

Mn^2+(aq) + 4H2O(l) ------------> MnO4^-(aq) + 8H^+(aq) + 5e

Reduction half equation:

5[VO2]^+(aq) + 10H^+(aq) + 5e --------> 5[VO]^2+(aq) + 5H2O(l)

Overall redox reaction equation:

Mn^2+(aq) + 4H2O(l) + 5[VO2]^+(aq) + 10H^+(aq) ---------->MnO4^-(aq) + 8H^+(aq) + 5[VO]^2+(aq) + 5H2O(l)

6 0
4 years ago
Please please please help​
Reika [66]

Explanation:

A. to make it mix better

B. using a spatula

C. fractional destilations

7 0
3 years ago
Draw the carboxylic acid produced from the acid hydrolysis of butyl acetate.
Nat2105 [25]

Answer:

Acetic or ethanoic acid.

Explanation:

Hello,

Butyl acetate's hydrolisis is shown below:

CH_3COOCH_2CH_2CH_2CH_3+H_2O-->CH_3COOH+CH_3CH_2CH_2CH_2OH

Whereas CH_3COOCH_2CH_2CH_2CH_3 is the butyl acetate, CH_3CH_2CH_2CH_2OH butanol and CH_3COOH the required produced acid, acetic or ethanoic acid (attached picture).

Best regards.

7 0
3 years ago
10. Tell me one thing that you learned or was significantly cleared up by doing
Alex73 [517]
What do you mean tell me one thing you learned what did you learn
5 0
3 years ago
In the following reaction, how many grams of NaBr will produce 244 grams of NaNO3? Pb(NO3)20) + 2 NaBr jaPbBr2s 2 NaNO3a) The mo
Shtirlitz [24]
<span> Pb(NO3)2 + 2 NaBr ------> PbBr2 + 2 NaNO3
                     2 mol                             2 mol

M(NaBr)= 102 g/mol
M(NaNO3) = 85 g/mol

1) 244g NaNO3 *1 mol NaNO3/85 g NaNO3 = 244/85 mol NaNO3

2)</span> Pb(NO3)2 + 2 NaBr ------> PbBr2 + 2 NaNO3
                     2 mol                             2 mol<span>
                     x mol                             </span>244/85 mol 
<span>
x=(2 mol*</span> 244/85 mol )/2 mol =  244/85 mol NaBr
<span>
3) </span> 244/85 mol NaBr*102g NaBr/1 mol = (244*102/85) g NaBr =292.8 g NaBr<span>
              

</span>
8 0
3 years ago
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