3 years ago

Hurry!!!!! Will Give Brainlist!!!!

Chemistry

2 answers:

Aleksandr-060686 [28]3 years ago

7 0

Answer:

Answer: a chemical Change, because a gas is being formed

Ipatiy [6.2K]3 years ago

5 0

Answer: B) A chemical change change, because a gas is being formed.

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Heat required : 4.8 kJ

<h3>Further explanation </h3>

The heat to change the phase can be formulated :

Q = mLf (melting/freezing)

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$\tt Q=10\times 2.09\times (0-(-20)=418~J$

2. phase change(ice to water)

$\tt Q=10\times 333=3330~J$

3. heat to raise temperature from 0 °C to 25 °C

$\tt Q=10\times 4.18\times (25-0)=1045~J$

$\tt Q~tot=418+3330+1045=4793~J\rightarrow rounding~and~2~sig~figs=4.8~kJ$

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