Acid–base reactions are hard to observe because they usually do not provide any visual cues. in this lab, you used a thermometer to determine that a reaction occurred between vinegar and sodium hydroxide. how could you detect the changes caused by this reaction in a classroom laboratory if you did not have access to a thermometer

Answer is: using acid-base indicator or pH indicators.

Acid-base indicators are usually weak acids or bases and they are chemical detectors for hydrogen or hydronium cations.
Example for acid-base indicator is phenolphthalein (molecular formula C₂₀H₁₄O₄). Phenolphthalein is colorless in acidic solutions and pink in basic solutions.
Another example is methyl orange. It is red colour in acidic solutions and yellow colour in basic solutions.

answer; capital earns interest; entrepreneurship receives a profit or incurs a loss;

the formula for the conversion of temperature from degree celsius to kelvin is:

the sample of water at is converted to kelvin temperature by using the above formula as:

on comparing the two samples of water at or we can say that at and at respectively. the difference between the temperatures of two samples of water is:

hence, one can say that the sample of water at is greater than the sample of water at by .