Energy changes Quiz 2

Quiz
•
Science
•
9th Grade
•
Medium
Mathew Suchecki
Used 2+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Energy is conserved in chemical reactions. What is meant by the term 'conservation of energy'?
energy is created in chemical reactions
energy is used up in chemical reactions
no energy is transferred in a chemical reaction
the amount of energy in the universe at the end of a chemical reaction is the same as before the reaction takes place
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A student carried out an investigation into the temperature change when citric acid reacts with sodium hydrogencarbonate. What type of reaction takes place between citric acid and sodium hydrogencarbonate?
endothermic
exothermic
isothermic
thermal decomposition
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is an example of an exothermic reaction?
combustion
cooking an egg
photosynthesis
thermal decomposition
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which variable would not affect the temperature change in a reaction between a metal carbonate and an acid?
the volume of acid
the concentration of the acid
the mass of metal carbonate
the room temperature
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In an investigation into the temperature change during a chemical reaction, how can the transfer of energy to the surrounding air be minimised?
carry out the reaction in a glass beaker
carry out the reaction in a polystyrene cup
use a higher concentration of reactants
use a thermometer with a higher resolution
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A group of students carried out an investigation into the reaction between sodium hydroxide and hydrochloric acid. The students' results are shown in Table 2. What is the mean temperature change to 2 significant figures?
11°C
12°C
13°C
47°C
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is activation energy?
the energy that the reactant particles have at the start of a reaction
the energy that is released in a chemical reaction
the energy needed to get particles moving
the energy needed for a reaction to occur
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