AQA science double award modular, how&#x27;d it go?

jjkkll

no the reaction was endothermic

the reactants have less energy thn the products

realy but the doesnt that mean energy is given of as heat?

Reply 41

jjkkll

it takes in energy from the surroundings

Reply 42

jjkkll

I put Gravity and Outward expansion

will i get the mark????????

Reply 43

no it was endothermic.

It had more energy at the end because the line was higher up the y axis!

this is the energy kept for holding new bonds

Reply 44

x.beth.x

11

style

realy but the doesnt that mean energy is given of as heat?

no that's exothermic :smile:

The one with the graph was endothermic.

Reply 45

Iankk

what was the answer to the one about the sun and what will happen at the end of its stable part of its life cycle, i put that it would expand and cool at a extremely fast rate, into a red giant, due to a lack of hydrogen. is this correct?

Reply 46

jjkkll

I put Gravity and Outward expansion

will i get the mark????????

dunno was it 1 or 2 marks.

Gravity is right and it is outward expansion from heat so i dunno?

I just put heat

Reply 47

fahmiaziz

Student070707

I was glad eutrification came up and although it was minimal; the star cycle.

Bit annoyed that calculations didnt come up. Except the stupidly easy one about Mr!!!

was the answer 111?

Reply 48

are you sure? because=i took away the energy needed to make the bonds away from the energy needed to make the bonds and got 400 and something, i though for endothermic you would have gotten a negative number? :confused:

Reply 49

mdmfsnfsfiosiq

for the two forces of the sun qestion did anyone else put: weight and gravity?

Reply 50

Kt.b

12

style

haha same here although mine answer wasnt as intelligent sounding as yours i just said developement that doesnt harm or damage the enviroment.

what did you get for that energy graphy with X , y and z?
was it that the reaction was exothermic?

I put endothermic reaction as reactants have less energy then products

X= amount of energy need to break water molecules
Y= amount of energy needed to break diatomic oxygen and hydrogen bonds
Z= proving it was endothermic reaction

I hope that's right.... :rolleyes:

Reply 51

Iankk

what was the answer to the one about the sun and what will happen at the end of its stable part of its life cycle, i put that it would expand and cool at a extremely fast rate, into a red giant, due to a lack of hydrogen. is this correct?

It cools and contracts (red giant)

Can either become a white then black dwarf

or

secondary generation star/solar system

with neutron star or black hole

Reply 52

damm and i was so sure i was right!
around 2 mrks lost

Reply 53

Kt.b

12

style

are you sure? because=i took away the energy needed to make the bonds away from the energy needed to make the bonds and got 400 and something, i though for endothermic you would have gotten a negative number? :confused:

Nope endothermic is positive number sorry :s-smilie:

Only like 2 marks though, doubt it will affect your whole paper. :smile:

Reply 54

fahmiaziz

was the answer 111?

Yh i got that :biggrin:

Reply 55

x.beth.x

11

Kt.b

I put endothermic reaction as reactants have less energy then products

X= amount of energy need to break water molecules
Y= amount of energy needed to break diatomic oxygen and hydrogen bonds
Z= proving it was endothermic reaction

I hope that's right.... :rolleyes:

I think Y was the amount of energy released when the bonds were formed, since it went down. Well that's what I put anyway!

Reply 56