(No files or links) Which of the following is a defining property of gases?

The crew of a cargo plane wishes to drop a crate of supplies on a target below. To hit the target, where should the crew drop th

Nostrana [21]

I don’t know geting points

7 0

3 years ago

A 0.350 kg block at -27.5°C is added to 0.217 kg of water at 25.0°C. They come to equilibrium at 16.4°C. What is the specific he

Gekata [30.6K]

The specific heat capacity of the block is $508J/kg^{\circ}C$

Explanation:

As the block is placed into the water, heat energy is transferred from the water (which is at higher temperature) to the block (which is at lower temperature), until the block and the water are in thermal equilibrium (= same temperature).

Therefore, we can write:

$Q_{water}=Q_{block}$

Where

$Q_{water}=m_w C_w (T_w-T_{eq})$ is the heat energy released by the water, where

$m_w = 0.217 kg$ is the mass of the water

$C_w = 4186 J/kg^{\circ}C$ is the water heat specific capacity

$T_w = 25.0^{\circ}$ is the initial temperature of the water

$T_{eq}=16.4^{\circ}$ is the temperature at equilibrium

Substituting,

$Q_{water}=(0.217)(4186)(25.0-16.4)=7812 J$

Now we can write the heat energy absorbed by the block as

$Q_{block}=m_b C_b(T_{eq}-T_b)$

where

$m_b=0.350 kg$ is the mass of the block

$C_b$ is the specific heat capacity of the block

$T_b = -27.5^{\circ}$ is the initial temperature of the block

And solving for $C_b$ ,

$C_b=\frac{Q_{block}}{m_b(T_{eq}-T_b)}=\frac{7812}{(0.350)(16.4-(-27.5))}=508J/kg^{\circ}C$

Learn more about specific heat capacity:

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6 0

3 years ago

How much heat is required to convert 1 gm of ice into steam

oksano4ka [1.4K]

Answer:

Heat required in converting 1g of ice at −10∘C into steam at 100∘C is: latent heat of fusion= 80 cal/g80 cal/g. latent heat of vaporization=540 cal/g.

8 0

3 years ago

Bromine is a liquid at room temperature. The volume of a sample of bromine is measured in a 50 beaker and a 100 ml beaker. How w

Stells [14]

Answer:

The comparisons are;

The height of the bromine in the 50 ml beaker will be twice that of the 100 ml beaker

The measurement of the volume with the 50 ml beaker will be more accurate than the measurement taken with the 100 ml beaker, because the differences in the height of the bromine in the 50 ml beaker is more obvious than the differences measured with the 100 ml beaker.

The actual volume of bromine in both beakers will be equivalent

Explanation:

The properties of a liquid are;

1) The volume of a liquid is relatively fixed at conditions that are suitable for it to remain in the liquid state compared to the volume occupied by a gas

2) A liquid will assume the shape of a container in which it is placed

3) The surface of a liquid in a container is flat due in order that the attractive forces between the molecules of the liquid at the surface and inside the body of the liquid should be in equilibrium

Therefore, given that the volume of the Bromine is measured in 50 ml beaker and a 100 ml beaker, there will be differences in the measured height of the same volume of bromine in each beaker.

5 0

3 years ago

A spinning top initially spins at 16rad/s but slows down to 12rad/s in 18s, due to friction. If the rotational inertia of the to

Alex Ar [27]

Answer:

The change in angular momentum is $\Delta L = 0.0016 \ kgm^2/s$