Question

Q2 Vishal and manish are carrying out an investigation into the heat given off when they add pieces of calcium to water . They both use 10 cm 3 water and add pieces of calcium
These are Vishal’s results:
Mass of calcium added/g Start temperature / o c Final temperature / o c
1------------------------------------------ 19 ------------------------20
2 -----------------------------------------19 -------------------------21
3 -------------------------------------------19-------------------------- 22
4------------------------------------------------ 19 ----------------------23 These are Manish’s results
Mass of calcium added/g Start temperature/ o c Final temperature / o c
1 21 22
2 21 22
3 21 24
4 21 25 a) What trend is shown by both sets of results?
………………………………………………………………………………………………………
…………………………………………………………………………………………
……………………………………………………………………………
b) Predict what would happen if 5g of calcium were added ------------------

Answer 1

Answer:

Change the following questions in its Indirect form:-

a. Shireen said to her mother, “where is my water bottle?”

b. He said, “ When they will be moving out?”

c. He said to us , “ Has your team won?”

d. He said, “ Which room shall he sleep in?” e. The coach said to Sonia , “ Is it your turn?”

Answer 2

Answer:

a) adding mass of calcium causes rise of temperature

b) more heat would produce