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2 years ago

What type of energy changes take place when a candle burns

2 answers:

8 0

This would be chemical energy that is converted to heat. The heat from the wick melts the wax which gets absorbed in the wick and then gets burnt (which is really oxidation) to produce heat energy as well as light energy.

frutty [35]2 years ago

7 0

The two types of energy changes that occur are heat and light changes.

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Jlenok [28]

Answer:

Second one

Explanation:

I think it's the second cause there's no energy w/o heat. So it's the second.

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2 years ago

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The modern model of the atom shows that electrons are:

Lina20 [59]

Electrons are orbiting the nucleus in the fxed way paths located in solid sphere

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2 years ago

Plants produce a variety of substances:food,flavoring,drugs,poisons.this is a result of

tatuchka [14]

Answer:

Synthesis

Explanation:

They synthesize these chemicals

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2 years ago

How much heat is released as the temperature of 25.2 grams of iron is decreased from 72.1°C to 9.8°C? The specific heat of iron

prisoha [69]

Answer:

$Q=-697.06\ J$

Negative sign says that release of heat.

Explanation:

The expression for the calculation of the heat released or absorbed of a process is shown below as:-

$Q=m\times C\times \Delta T$

Where,

$\Delta H$ is the heat released or absorbed

m is the mass

C is the specific heat capacity

$\Delta T$ is the temperature change

Thus, given that:-

Mass = 25.2 g

Specific heat = 0.444 J/g°C

$\Delta T=9.8-72.1\ ^0C=-62.3\ ^0C$

So,

$Q=25.2\times 0.444\times -62.3\ J=-697.06\ J$

Negative sign says that release of heat.

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2 years ago

WHICH STATE OF MATTER IS THIS: PARTICLES VIBRATE AND CHANGE POSITION

SVETLANKA909090 [29]

Answer: Gas. Gas vibrates and move freely at high speeds.

Explanation:

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2 years ago

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