Heat of Reaction

reactions absorb energy around it making the area feel 'colder.' reactions release energy to the surrounding area making the area feel 'warmer.'

• Endothermic

• Exothermic

• Isothermic

Tags

NGSS.HS-PS1-4

Some chemical reactions are ​ (a)   where the heat energy is absorbed. Other chemical reactions release heat energy are known as ​ (b)   .​

• endothermic

• exothermic

• thermal

• geothermal

Tags

NGSS.HS-PS1-4

reactions absorb energy around it making the area feel 'colder.' reactions release energy to the surrounding area making the area feel 'warmer.'

• Endothermic

• Exothermic

• Isothermic

Tags

NGSS.HS-PS1-4

require(s) the addition of energy for a reaction to occur.

• Endothermic Reactions

• Exothermic Reactions

• Combustion Reactions

• Condensation

Tags

NGSS.HS-PS1-4

(a)   require(s) the addition of energy for a reaction to occur.

• Endothermic Reactions

• Exothermic Reactions

• Combustion Reactions

• Condensation

Tags

NGSS.HS-PS1-4

Endothermic reactions ​ (a)   energy and exothermic reactions ​ (b)   energy.

• store

• release

Answer explanation

Endothermic reactions absorb or take in energy from their surroundings, hence the correct answer for the first blank is 'absorb'. On the other hand, exothermic reactions release energy into their surroundings, hence the correct answer for the second blank is 'release'.

Tags

NGSS.HS-PS1-4

In an exothermic reaction, heat energy required to break bonds in the reactants is __________ than heat energy released in forming bonds in the products.

Dalam tindak balas eksotermik, tenaga haba yang diperlukan untuk memutuskan ikatan dalam bahan tindak balas adalah __________ berbanding tenaga haba yang diperlukan untuk membentuk ikatan.

• Higher

  Lebih tinggi

• Lower

  Lebih rendah

Tags

NGSS.HS-PS1-4

All combustion reactions are ________________.

• Exothermic reactions

  Tindak bala eksotermik

• Endothermic reaction

  Tindak bala endotermik

Tags

NGSS.HS-PS1-4

The reactions which take place during cooking is _____________.

Tindak balas yang berlaku semasa memasak adalah _______________.

• Exothermic reactions

  Tindak balas eksotermik

• Endothermic reaction

  Tindak balas endotermik

Tags

NGSS.HS-PS1-4

State the device that can be used to measure the temperature of the reaction.

Nyatakan alat yang boleh digunakan untuk mengukur suhu tindak balas.