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WorksheetsExothermic and endothermic reaction
Total questions: 10
Worksheet time: 4mins
What type of chemical reaction absorbs energy and requires energy for the reaction to occur?
A. endothermic
B. exothermic
C. thermal energy
____ reactions usually feel cold.
A. exothermic
B. thermal energy
C. endothermic
In an endothermic reaction, energy is _________.
absorbed
released
_____ reactions usually feel hot!
enothermic
exothermic
When calcium reacts with water, the temperature changes from 18°C to 39°C. Which statement is correct?
A. The solution at the end is acidic
B. The reaction is exothermic
C. The reaction is reversible
D. The reaction is endothermic
When barium hydroxide and ammonium chloride react, the temperature of the mixture decreases. What kind of reaction is this?
A. endothermic
B. exothermic
C. thermal
D. heat
A chemical reaction accompanied by the releasing of heat.
A. endothermic
B. exothermic
C. thermal
D. heat
When ammonium chloride dissolves in water the temperature falls. The type of energy change is described as?
A. exothermic
B. activated
C. decomposition
D. endothermic
Which of these processes is always exothermic?
A. evaporation
B. burning
C. insulation
D. melting
___________means thermal energy is being released from the object or substance, so it feels hot to us.
A. endothermic
B. heat
C. thermal
D. exothermic
