Chemistry, 06.12.2019 00:31 omgits14

If 1.10 g of steam at 100.0 °c condenses into 38.5 g of water, initially at 27.0 °c, in an insulated container, what is the final temperature of the entire water sample? assume no heat is lost to the surroundings.

Answers: 1

Show answers

Answers

Answer from: pnicklin00

Temperature = 44.02°C

Explanation:

Insulated container indicates no heat loss to the surroundings.

The specific heat capacity of a substance is a physical property of matter. It is defined as the amount of heat that is to be supplied to a unit mass of the material to produce a unit change in its temperature.

The SI unit of specific heat is joule per kelvin and kilogram, J/(K kg).

Now,

Specific heat for water is 4.1813 Jg⁻¹K⁻¹.

Latent heat of vaporization of water is 2257 Jg⁻¹.

Energy lost by steam in it's process of conversion to water, is the energy acquired by water resulting in an increase in it's temperature.

$Q = mS \Delta T$

Q= Heat transferred

m= mass of the substance

T= temperature

Also,

Q = mL

L= Latent heat of fusion/ vaporization ( during phase change)

Now applying the above equations to the problem:

$m_{w} S_{w} (T-27) = (m_{s} L) + m_{s}S_{w} (100 -T)$

$38.5 \times 4.1813 \times (T-27) = (1.10 \times 2257) + 1.10 \times 4.1813 \times (100 -T)$

Temperature = 44.02°C

Answer from: Quest

assuming that your periodic table has eighteen columns, you should highlight the four elements in the third column from the left of the table.

explanation

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the $3d$ have energy higher than those in the $4 s$ orbital while lower than those of the $4 p$ orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the $4s$ orbital is therefore filled right after $3p$ orbitals and before $3 d$ orbitals.

potassium has electron configuration $[\text{ar}] 4 s^{1}$ and calcium $[\text{ar}] 4 s^{2}$ . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration $[\text{ar}] 4 s^{2} \; 3d^{1}$ and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the $ns^{2} \; (n-1) p^{1}$ and should be highlighted as well.

Answer from: Quest

The answer for this question is d. none of these

Other questions on the subject: Chemistry

Chemistry, 22.06.2019 21:00, rah45

Which of these is an example of pseudoscience? a) predicting the time of sunrise based on data on position of earth b) predicting the date of the moon phases based on data on position of earth c) predicting eclipses based on the position of the sun and the moon d) predicting future events in a person's life based on the position of the moon

Answers: 1

continue

Chemistry, 22.06.2019 23:00, PatrickHB

What prefix multiplier is appropriate for reporting a measurement of 5.57 ×10−5 m?

Answers: 1

continue

Chemistry, 23.06.2019 00:00, glocurlsprinces

(04.05 hc) analyze the given diagram of the carbon cycle below. part 1: which compound does c represent? part 2: name a process that could release this compound into the air. part 3: explain how the elements that form it are conserved during the carbon cycle. use complete sentences to explain your answer. justify how this compound was created from a recycling of carbon in the carbon cycle. use complete sentences to explain your answer.

Answers: 3

continue

Chemistry, 23.06.2019 01:00, only1cache

Which is true concerning the products and reactants of photosynthesis and cellular respiration? a. the products of photosynthesis are sugars and the reactants of cellular respiration are starches. b. the products of photosynthesis are reactants in cellular respiration. c. oxygen is needed for photosynthesis and is given off in cellular respiration.

Answers: 2

continue

You know the right answer?

If 1.10 g of steam at 100.0 °c condenses into 38.5 g of water, initially at 27.0 °c, in an insulated...