Energetics experiments

Question 1

define calorimetry

Answer 1

process of measuring the amount of heat energy absorbed or heat energy released during a chemical reaction

Question 2

why is a polystyrene cup used instead of a beaker

Answer 2

because a polystyrene cup is a better insulator of heat mthen a glass beaker

Question 3

Neutral PH

Answer 3

7

Question 4

Acid pH

Answer 4

low ph levels 0 to 6

Question 5

alkali/base PH

Answer 5

high ph 8 to 14

Question 6

phenolphthalein ( neutralisation reaction )

Answer 6

colourless- acid or neutral
base-pink

Question 7

methyl orange ( neutralisation reaction )

Answer 7

red-acid
orange-neutral
yellow-alkali

Question 8

combustion reactions
why is a copper can used

Answer 8

because copper is a good conductor of heat

Question 9

combustion reactions
why is there a lid used for the copper can

Answer 9

because it prevents ethanol fuel from the spirit burner evaporating