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mixer [17]
3 years ago
9

What always happens during a chemical change?

Chemistry
1 answer:
Vera_Pavlovna [14]3 years ago
7 0
In a chemical change, the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed, the change is called a chemical change.
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How many moles in 0.672L of F2?
marishachu [46]

Answer:

c

Explanation:

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3 years ago
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Using Gibbs Equation, dU=TdS-pdV show that (dS/dV) at a constant U =P/T. The reciprocal of (dS/dU)v = 1/T.
Troyanec [42]

Explanation:

dU=TdS-pdV (given)

To prove = 1) (\frac{dS}{dV})_U=\frac{P}{T} (at constant U)

2) (\frac{dS}{dU})_v=\frac{1}{T} (at constant V)

Solution: 1)

dU=TdS-PdV

PdV=TdS-dU

P=\frac{(TdS)}{dV}-\frac{dU}{dV}

Derivative of constant is zero.

Given that internal energy is ,U = constant

P=T\frac{dS}{dV}-0

\frac{dS)}{dV}=\frac{P}{T} (hence proved)

Solution: 2)

dU=TdS-PdV

Differentiating with respect to dU, we get:

(\frac{dU}{dU})_v=T(\frac{dS}{dU})_v-P(\frac{dV}{dU})_v

Derivative of constant is zero.

Given that volume is constant , V= constant

1=T(\frac{dS}{dU})_v

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5 0
4 years ago
Which of the following best describes a lens Galaxy
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They are invisible  to us ,but they little shining balls that come together.
3 0
4 years ago
q=mcΔT. Given this equation find the change in temperature. q = 600 J, m= 25.0 g, c= 0.897 J/g°C. What is ΔT?
hodyreva [135]

Answer:

Change in temperature = ΔT = 26.8°C

Explanation:

Given data:

Heat absorbed = 600 j

Mass = 25.0 g

Specific heat capacity = 0.897j /g°C

Change in temperature = ΔT= ?

Solution:

Formula:

q = mcΔT

600 j =  25.0 g ×0.897 j/g°C×ΔT

600 j =  22.425 j/°C×ΔT

ΔT = 600 j /22.425 j/°C

ΔT = 26.8°C

7 0
3 years ago
Which two statements explain how a cell's parts help it get nutrients?
olchik [2.2K]

Answer:

A and i think D

Explanation:

8 0
3 years ago
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