Question

calculate the enthalpy of formation of CH3COOH(acetic acid) when enthalapy of combustion of carbon, hydrogen and Acetic acid is - 393.5kJ,-285.8kJ respectively. Answer this please no spams ✖️✖️✖️✖️✖️​

Answer 1

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Answer 2

Hey mate !!

Here is ur Answer ⤵️

Question - prove that law of conversation of mechanical energy for a freely pulling object

Answer -

Law of conservation of energy states that:−

Energy can neither be created nor be destroyed.

Energy transforms from one form to another form and, potential energy+ kinetic energy= constant

Proof:−

At point A

K.E=0m/s

P.E=mgh

P.E=mgh

At point B,

K.E.,

2gh=V 2 −O2

V2 =2gx

K.E= 2/1 mV2

K.E= 2/1 m.2gx

K.E=mgx-----------------------------(1)

P.E=mgh

P.E=m.g.(h−x)

P.E=mgh−mgx---------------------(2)

from(1) and (2)

K.E+P.E constant

mgx+mgh−mgx=mgh

mgh=mgh

At point C,

P.E=0

2gh=v 2 −u 2 ( initial velocity =0 m/s)

2gh=v 2

K.E= 2/1 .m.v

K.E= 2/1 .m.2gh

K.E=mgh

Thus, in all the points the energy is same.

For more clarity use can see the above attachment

Hope it helps you ✌️

Thank you ❣️

@Love hunter