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Interpretation:
For the reaction between NaHCO3 and HCl carried out in a beaker, the evidence indicating energy transferred from the surroundings to the beaker needs to be identified from the given options.
Concept introduction:
An endothermic process involves absorption of heat by the system from the surroundings, whereas an exothermic process involves liberation of heat by the system to the surroundings.
![Check Mark](/static/check-mark.png)
Answer to Problem 2STP
(D) The beaker would feel hot to the touch
Explanation of Solution
The given reaction is:
Here, the system is the beaker containing the above reactants and products. If energy were transferred from the surroundings into the system, then the temperature inside the beaker would increase and it would feel hot to the touch.
Therefore, the evidence that would indicate that energy is transferred from the surroundings to the system is that the beaker would feel hot to the touch
Chapter U5 Solutions
Living by Chemistry
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