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
lakkis [162]
3 years ago
13

GIVING BRAINLIEST One mole of hydrogen gas (H2), reacts with one mole of bromine Br2(g) to produce 2 moles of hydrogen bromide g

as (HBr). The reaction releases 72.58 kJ of heat. Which equation is the correct form to show the standard molar enthalpy of formation?
H2(g) + Br2(l) → 2HBr(g) ΔHf0= -145.16 kJ

A.1/2H2(g) + Br2(l) → HBr(g) ΔHf0= -72.58 kJ

B.H2(g) + Br2(l)→ HBr(g) ΔHf0= -36.29 kJ

C.1/2 H2(g) + Br2(l) → HBr(g) ΔHf0= -72.58 kJ

D.1/2H2(g) + Br2(l) → HBr(g)ΔHf0= -36.29 kJ
Chemistry
1 answer:
JulsSmile [24]3 years ago
4 0

Answer:

The equation to show the the correct form to show the standard molar enthalpy of formation:

\frac{1}{2}H_2(g) +\frac{1}{2}Br_2(l)\rightarrow HBr(g) ,\Delta H_{f}^o= -36.29 kJ

Explanation:

The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy during the formation of 1 mole of the substance from its constituent elements, with all substances in their standard states.

Given, that 1 mole of H_2 gas and 1 mole of Br_2 liquid gives 2 moles of HBr gas as a product.The reaction releases 72.58 kJ of heat.

H_2(g) + Br_2(l)\rightarrow 2HBr(g) ,\Delta H_{f}^o= -72.58kJ

Divide the equation by 2.

\frac{1}{2}H_2(g) +\frac{1}{2}Br_2(l)\rightarrow HBr(g) ,\Delta H_{f}^o= -36.29 kJ

The equation to show the the correct form to show the standard molar enthalpy of formation:

\frac{1}{2}H_2(g) +\frac{1}{2}Br_2(l)\rightarrow HBr(g) ,\Delta H_{f}^o= -36.29 kJ

You might be interested in
Hellpppppp! Please!!!!
lana [24]

the answer is :the concentration the chemicals in the solution because the more ions there are in the solution the higher the conductivity also the more ions there are in the solution the stronger the electrolyte

6 0
3 years ago
The amount of energy needed to heat 6.2 g of a substance from 50.0°C to 80.0°C is 27.4 J. What is the specific heat capacity of
taurus [48]

Answer:

The heat capacity for the sample is 0.913 J/°C

Explanation:

This is the formula for heat capacity that help us to solve this:

Q / (Final T° - Initial T°) = c . m

where m is mass and c, the specific heat of the substance

27.4 J / (80°C - 50°C) = c . 6.2 g

[27.4 J / (80°C - 50°C)] / 6.2 g = c

27.4 J / 30°C . 1/6.2g = c

0.147 J/g°C = c

Therefore, the heat capacity is 0.913 J/°C

7 0
3 years ago
Ethene is the first member of the
FrozenT [24]
The answer is (b.) alkyne series.
8 0
3 years ago
A teacher wants to perform a classroom demonstration that illustrates both chemical and physical changes. Which would be the bes
Fofino [41]

A bike rusting is an example of a chemical change since rusting is a chemical reaction. New substances are formed from this reaction. On the other hand, other choices given are just physical changes because only the shape or the physical form of the substances are being changed. An example of a physical change is cutting a paper.

4 0
3 years ago
This is called what ??
kirill115 [55]

Answer:

Reflection

Explanation:

Because light is bouncing of the object

8 0
2 years ago
Other questions:
  • What sample has particles with the lowest average kinetic energy
    13·1 answer
  • How many moles are in 2.0 grams of FeO
    14·2 answers
  • Which of the following would represent a single displacement reaction between Potassium Bromide (K^+Br^-) and Iodine (I), which
    12·1 answer
  • A mixture containing nitrogen and hydrogen weighs 3.49 g and occupies a volume of 7.45 L at 305 K and 1.03 atm. Calculate the ma
    6·1 answer
  • The radius of a copper atom is 1.3⋅10^−10m. How many times N can you divide evenly a 11.1 cm long line of copper atoms until it
    8·1 answer
  • Consider the reactionI2(g) + Cl2(g)2ICl(g)Using standard thermodynamic data at 298K, calculate the entropy change for the surrou
    12·1 answer
  • If cobalt metal is mixed with excess sulfur and heated strongly, a sulfide is
    13·1 answer
  • How much energy is required to vaporize 1.5 kg of copper? (Refer to table of
    6·1 answer
  • Help me please i need it for homework i cant seen to solve the answer :((
    11·1 answer
  • If you are running at top speed and try to stop suddenly, what happens?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!