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3 years ago

Which energy transformations occur when a candle burns?

Chemistry

2 answers:

Yakvenalex [24]3 years ago

8 0

Answer:

thermal energy transforms into radiant energy and chemical energy

NikAS [45]3 years ago

7 0

Answer:

HHHHHHHHHHHHHHHHHHHHH like you said to me!!!!!!!!!!!!!!!!!!!!!!!

Explanation:

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What else supports the idea that an exothermic reaction has occurred?

kodGreya [7K]

The main pieces of evidence that an exothermic reaction has occurred is an increase in temperature due to the release of energy, a release of energy in the form of light, or a release of gas.

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3 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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3 years ago

Hshshsbxbxbbxbzhzhxbdidu

Marysya12 [62]

Rffffffffffffffffffffffffffffffrrrrrrrrrrrrrrrrrrrrrrfffffffffffffffffffrrrrrrrrrrrrrrrrr

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3 years ago

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A solution that contains a large amount of salt and a small amount of water is said to be a _______ solution. A. diffused B. uns

Pachacha [2.7K]

Answer:

D. Concentrated

Explanation:

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3 years ago

Read 2 more answers

To start the chemical reaction, what must happen between the enzyme and the substrate?.

yaroslaw [1]

The enzyme must attract substrates to its active state.
At the end of the reaction, products dissociate from the surface of the enzyme

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2 years ago