BARU
Ukuran huruf
Lembar kerjaEndo Exo Graph
Total soal: 23
Worksheet time: 15mins
In an exothermic reaction, heat is ...
taken in or absorbed
given out or released
In an endothermic reaction, heat is ...
taken in or absorbed
given out or released
What type of reaction occurs in a hand warmer?
exothermic
endothermic
What instrument would you use to detect an endothermic or exothermic reaction?
triple beam balance
ruler
thermometer
When a candle is lit hydrocarbons are combusting. An exothermic reaction is occuring. Energy is being _________________ .
absorbed
frozen
destroyed
released
In an endothermic reaction, energy is a
reactant
product
In an endothermic reaction, energy is a
reactant
product
What type of reaction has taken place?
Endothermic
Exothermic
During an endothermic reaction, the surroundings (including the container, the air, your hands, etc) would feel _______.
Warm
Cold
A student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true?
It is an exothermic reaction
It is an endothermic reaction
What is true of this reaction?
it is endothermic
it is exothermic
What is true of the reaction described below?
Br2 + Cl2 + energy → 2BrCl
It is exothermic because energy was released.
It is endothermic because energy is absorbed.
How do you know that energy is being absorbed during a chemical reaction?
Temperature of the surroundings increases
Temperature of the surroundings decreases
Which of the following is always exothermic?
decomposition reactions
single displacement reactions
combustion reactions
double displacement reactions
Which word best describes the reaction below?
2 H2 + O2 → 2 H2O + energy
endothermic
exothermic
Which letter corresponds to the activation energy?
A
B
C
D
Which letter represents the reactants?
B
A
Which letter represents the products?
B
A
