1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ganezh [65]
3 years ago
15

What is the temperature change in 355 mL of water upon absorption of 34 kJ of heat? (The specific heat capacity of water is 4.18

4 J/(g⋅∘C).)
Chemistry
2 answers:
frozen [14]3 years ago
7 0

The temperature change is 23 °C.

<em>q = mC</em>Δ<em>T</em>

Δ<em>T</em> = <em>q</em>/(<em>mC</em>)

<em>m</em> = 355 g

∴ Δ<em>T</em> = (34 000 J)/(355 g × 4.184 J·°C⁻¹g⁻¹) = 23 °C

<em>Note</em>: The answer can have only <em>two significant figures</em> because that is all you gave for the amount of heat absorbed.

ozzi3 years ago
3 0

Answer : The change in temperature will be, 22.89^oC

Explanation :

First we have to determine the mass of water.

Density=\frac{Mass}{Volume}

Given :

Density of water = 1 g/mL

Volume of water = 355 mL

1.00g/mL=\frac{Mass}{355mL}

Mass=355g

Now we have to determine the change in temperature.

Formula used :

Q=m\times c\times \Delta T

where,

Q = heat absorb = 34 kJ = 34000 J        (1 kJ = 1000 J)

m = mass of water = 355 g

c = specific heat of water = 4.184J/g^oC

\Delta T = change in temperature = ?

Now put all the given value in the above formula, we get:

34000J=355g\times 4.184J/g^oC\times \Delta T

\Delta T=22.89^oC

Therefore, the change in temperature will be, 22.89^oC

You might be interested in
Fill a glass jar with water. Put the jar in a place where it will not be moved. Gently put 2 drops of food coloring into the wat
aleksandrvk [35]

Answer:

A. Whatever is in the water, it moves. Even if a block is placed in there, it would move by sinking to the bottom. If a plastic bag was placed in there, it wouldn't sink but move a little.

4 0
3 years ago
Read 2 more answers
2. If 1.75 L of a gas is at 700. K and is under 250. kPa of pressure, what will the new
Andrews [41]

Answer:

Final volume is 3.50L

Explanation:

It is possible to find volume of a gas using combined gas law:

\frac{P_1V_1}{T_1} =\frac{P_2V_2}{T_2}

<em>Where P is pressure, V is volume and T is temperature of 1: initial state and 2: final state</em>

If initial state of the gas is:

1.75L of a gas is at 700K and is under 250kPa of pressure

And final state is:

298K and 53.2kPa.

Replacing:

\frac{250kPa*1.75L}{700K} =\frac{53.2kPa*V_2}{298K}

0.625L = 0.1785*V₂

<em>3.50L = V₂</em>

Thus, <em>final volume is 3.50L</em>

3 0
3 years ago
What is the Lewis structure for H2Se
S_A_V [24]
Basically since there’s 2 hydrogen’s there will be two H’s on either side of your other element. And Se is in group 6 which means it has 6 valence electrons. When you combine 6 and 2 from the hydrogen you get 8. You then should place 8 dots around Se two on each side.

So something like H Se(with 8 dogs around it) H
6 0
3 years ago
Compared to an endocrine response a nerve response differs in that the nerve response generally.
Nadusha1986 [10]

the nerve response is generally faster

Explanation:

nerves travel throughout neurotransmitters which is a faster response, like a reflex, than the hormones in the endocrine system, like the growth hormone.

7 0
3 years ago
How are half life and radioactive decay related
hoa [83]

Answer : Half life and radioactive decay are inversely proportional to each other.

Explanation :

The mathematic relationship between the half-life and radioactive decay :

N=N_oe^{-\lambda t}              ................(1)

where,

N = number of radioactive atoms at time, t

N_o = number of radioactive atoms at the beginning when time is zero

e = Euler's constant = 2.17828

t = time

\lambda = decay rate

when t=t_{1/2} then the number of radioactive decay become half of the initial decay atom i.e N=\frac{N_o}{2}.

Now substituting these conditions in above equation (1), we get

\frac{N_o}{2}=N_oe^{-\lambda t_{1/2}}

By rearranging the terms, we get

\frac{1}{2}=e^{-\lambda t_{1/2}}

Now taking natural log on both side,

ln(\frac{1}{2})=-\lambda \times t_{1/2}

By rearranging the terms, we get

t_{1/2}=\frac{0.693}{\lambda}

This is the relationship between the half-life and radioactive decay.

Hence, from this we conclude that the Half life and radioactive decay are inversely proportional to each other. That means faster the decay, shorter the half-life.

3 0
3 years ago
Other questions:
  • Which is a physical property of a gas?
    13·2 answers
  • What does fossil mean in my own words
    6·1 answer
  • The breaking buffer that we use this week contains 10mM Tris, pH 8.0, 150mM NaCl. The elution buffer is breaking buffer that als
    15·1 answer
  • In chemical compound , covalent bonds form when
    13·1 answer
  • Select the supplements that are minerals.
    6·1 answer
  • If it takes 54ml of 0.1 m naoh to neutralize 125 ml of a hcl solution with unknown concentration, what is the concentration of t
    13·1 answer
  • Based on its position in the table, with which other element do you think calcium might react?
    8·1 answer
  • A gas occupies a volume of 85.0 liters at a pressure of 2.24 atm and a temperature of 22.5 degrees celsius. How many moles of ga
    11·1 answer
  • Which option is an example of a physical property?
    8·2 answers
  • Which of the following can form a hydrogen bond with the HF molecule?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!