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
sineoko [7]
2 years ago
6

A chemist mixes 75.0 g of an unknown substance at 96.5°C with 1,150 g of water at 25.0°C. If the final temperature of the system

is 37.1°C, what is the specific heat capacity of the substance? Use 4.184 J / g °C for the specific heat capacity of water.
Chemistry
1 answer:
AleksAgata [21]2 years ago
6 0
To do this problem it is necessary to take into account that the heat given by the unknown substance is equal to the heat absorbed by the water, but considering the correct sign:

-m\cdot c_e\cdot \Delta T = m_w\cdot c_e_w\cdot \Delta T_w

Clearing the specific heat of the unknown substance:

c_e = \frac{m_w\cdot c_e_w\cdot \Delta T_w}{m\cdot \Delta T} = -\frac{1\ 150\ g\cdot 4.184\frac{J}{g\cdot ^\circ C}\cdot (37.1 - 25.0)^\circ C}{75\ g\cdot (37.1 - 96.5)^\circ C}

c_e = -\frac{1\ 150\ g\cdot 4.184\frac{J}{g\cdot ^\circ C}\cdot 12.1^\circ C}{75\ g\cdot (-59.4)^\circ C} = \bf 13.07\frac{J}{g\cdot ^\circ C}
You might be interested in
Under identical conditions, separate samples of O2 and an unknown gas were allowed to effuse through identical membranes simulta
Vilka [71]

Answer:

147.2g

Explanation:

The full solution can be found in the image attached. Graham's law was applied to the problem. The rate of diffusion of a gas is inversely proportional to its molar mass or vapour density. Molar mass= 2vapour density

8 0
2 years ago
If solid iron is dropped in liquid iron, it will most likely?
S_A_V [24]

it will sink

Explanation:

the solid iron will sink because it is dense than the liquid iron I will sink and it will melt

4 0
3 years ago
Read 2 more answers
Which type of force caused the weight to drop (11) after the rope was cut?
MatroZZZ [7]

Answer:

gravitational force.

8 0
3 years ago
In 1787,_________discovered a relationship between charge, their separation, and the force between the two charges. A coulomb B
masya89 [10]

The answer is A. Columb

Columb discovered a relationship between charge, their speration, and the force between the two charges in 1787

7 0
3 years ago
Who was the first person to describe a chemical reaction as the recombination of atoms?
Cerrena [4.2K]
Niels Bohr is the first person to describe a chemical reaction as the combination of atoms.
4 0
3 years ago
Other questions:
  • Given that 2S (s)+3O2 (g)→2SO3 (g)2SO2 (g)+O2 (g)→2SO3 (g) has an enthalpy change of −790.4 kJ has an enthalpy change of −198.2
    8·1 answer
  • A 5 kg block
    11·1 answer
  • The answers to number 2-13
    5·1 answer
  • Why do we use scientific notation or scientific exponential numbers in math calculations?
    8·1 answer
  • A gas occupies a volume of 1.00 L at 25.0°C. What volume will the gas occupy at 1.00 x10^2 °C?
    7·1 answer
  • A 110.-g sample of copper (specific heat capacity 0.20 J/C g) is heated to 82.4C and then placed in a container of water at 22.3
    5·1 answer
  • Help its due soon i need to get this right to pass the class
    6·2 answers
  • If a block weighs 125 grams and it has a volume of 5 mL, what is it's density?
    14·1 answer
  • PLZZZZZZZ NEED FAST HELP. AND I WILL MARK U BRILLIANT
    15·1 answer
  • Sodium is a metal (Na), what makes the Neutral atom of Sodium different
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!