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Summary Thermodynamics imp formulae neet ug
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Here given is the thermodynamics imp formulae for the neet ug. This makes sure your 3 to 4 questions go correct. This makes your revision faster..
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FORMULAEJoule's Law, work W« Q or W = JÌ
where Q= heat,
J= mechanical of heat equivalent
Work
=4.18J/ Cal.
Heat
When potential energy is converted into h
a) When work is used to rise the tempera
mgh = mcAt or
C
b) When work is used to melt the b
Mgh =mL or mass of substance me
m Mgh
=
L
When kinetic energy is converted into hea
a) When KE is used to rise the temperatur
the body
my' = mcAt ’ At=
2 2c
b) WhenK.E. is used to melt the body
Mv=mL
2
My?
Mass of substance melted m=
2L
From lst law of thermodynamics,
dQ = dU+ dW
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