temperature change rp

Question 1

what type of reaction is this experiment

Answer 1

exothermic–neutralistaion

Question 2

independent variable

Answer 2

volume of sodium hydroxide

Question 3

control variable

Answer 3

volume of HCL

conc of HCL

Question 4

dependent variable

Answer 4

maximum temp reached

Question 5

1st step

Answer 5

measure 30cm3 of dilute HCL and transfer to a polystyrene cup

Question 6

2nd step

Answer 6

stand the polystyrene cup inside a beaker

Question 7

3rd step

Answer 7

use a thermometer to measure the starting temp of the acid and record

Question 8

4th step

Answer 8

measure 5cm3 of sodium hydroxide and transfer into the cup

Question 9

5th step

Answer 9

plastic lid and thermometer through hole

Question 10

7th step

Answer 10

record the highest temperature reached and rinse out and dry

Question 11

8th step

Answer 11

repeat and increase the the amount of sodium hydroxide used by 5cm3

Question 12

what happens when the volume increases

Answer 12

the maximum temp reached increases

Question 13

why does the temp increase when the volume increases

Answer 13

more particles to react

Question 14

why is this an exothermic reaction

Answer 14

because energy is releases

Question 15

why does the temp start to decrease after a certain amount

Answer 15

not enough HCL to react

greater volume of solution–energy is spread out into a greater volume

Question 16

why use a polystyrene cup

Answer 16

-reduce heat loss