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sweet [91]
3 years ago
12

Heat always flows from a_________ place to a_________ place.

Chemistry
2 answers:
algol [13]3 years ago
5 0
Heat flows from high temperature to low temperature
vovangra [49]3 years ago
3 0

Explanation:

When a substance is heated then its molecules gain kinetic energy and they start to collide rapidly with each other.

As a result, when we place another object of a lower temperature then molecules of the hotter object tends to lose excess of energy.

Hence, this energy is transferred to the adjacent colder object. This means that heat flows from a hotter object to a colder object.

Thus, we can conclude that heat always flows from a hotter place to a colder place.

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7 0
2 years ago
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The standard free energy change for a reaction in an electrolytic cell is always:_________
sattari [20]

Answer: The standard free energy change for a reaction in an electrolytic cell is always positive.

Explanation:

Electrolytic cells use electric currents to drive a non-spontaneous reaction forward.

Relation of standard free energy change and emf of cell

\Delta G^o=-nFE^0_{cell}

where,

\Delta G^o = standard free energy change

  n= no of electrons gained or lost

F= faraday's constant

E^0_{cell} = standard emf

E^0_{cell}   = standard emf = -ve  , for non spontaneous reaction

Thus  \Delta G^o=(-ve)(-ve)=+ve

Thus standard free energy change for a reaction in an electrolytic cell is always positive.

8 0
2 years ago
what tool do you have to use to precise amount of water? A meter stick B stopwatch C balance D graduated cylinder E beaker F the
Serhud [2]

Answer:

graduated cylinder

Explanation:

It shows exact volume very precisely.

8 0
2 years ago
Which is the correct answer??
mestny [16]

Answer:

1

Explanation:

8 0
3 years ago
Calculate the pressure exerted by an book of mass 20kg occupying an area of 2 m square.​
kotykmax [81]

The answer is 100 Pa.

The formula for calculating pressure is :

<u>Pressure = Force ÷ Area</u>

<u />

We are given that :

  • mass = 20 kg
  • area = 2 m²

We also know that :

<u>Force = mass ×g</u>

<u />

So, force will be :

  • F = 20 × 10
  • F = 200 N

Now, we can finally calculate pressure :

  • P = 200 ÷ 2
  • P = 100 Pa
8 0
1 year ago
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