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3 years ago

8

Which statement describes a property of magnets? Magnets repel objects that are made of iron. Magnets attract sheets of paper. M

agnets attract or repel iron nails. Magnets attract or repel other magnets.

2 answers:

Contact [7]3 years ago

6 0

Answer:

D

Explanation:

jonny [76]3 years ago

6 0

Answer:

D. Magnets attract or repel other magnets

Explanation:

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Read 2 more answers

Calculate the work (kJ) done during a reaction in which the internal volume expands from 20 L to 43 L against an outside pressur

Alenkinab [10]

Answer:

$\large \boxed{\text{-10.0 kJ}}$

Explanation:

1. Calculate the work

w = - pΔV = -4.3 atm × (43 L - 20 L) = -4.3 × 23 L·atm = -98.9 L·atm

2. Convert litre-atmospheres to joules

$w = \text{-98.9 L\cdot$atm } \times \dfrac{\text{101.3 J}}{\text{1 L$\cdot$atm }} = \text{-10000 J} = \textbf{-10.0 kJ}\\\\\text{The work done is $\large \boxed{\textbf{-10.0 kJ}}$}$

The negative sign indicates that the work was done against the surroundings.

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