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3 years ago

How is an endothermic reaction identified?

Chemistry

2 answers:

Fynjy0 [20]3 years ago

6 0

D- It requires heat as a reactant

AnnZ [28]3 years ago

3 0

Answer: It requires heat as a reactant.

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When butanoic acid is reacted with methanol (using H2SO4 as a catalyst), what will be produced?

Aleks [24]

Answer:

alcohol (OH) + organic acid (COOH) → ester + water

Explanation:

example:

methanol + butanoic acid → methyl butanoate + watermethyl

5 0

3 years ago

The heat of vaporization of 1–pentanol is 55.5 kJ/mol, and its entropy of vaporization is 148 J/K•mol. What is the approximate b

tensa zangetsu [6.8K]

Answer:

375 K

Explanation:

Using the experssion shown below as:

$\Delta G^0=\Delta H^0_{vap}-T\Delta S^0_{vap}$

At vaporization point, the liquid and the gaseous phase is in the equilibrium.

Thus,

$\Delta G^0=0$

So,

$Delta H^0_{vap}=T\Delta S^0_{vap}$

Given that:

$Delta H^0_{vap}=55.5\ kJ/mol$

Also, 1 kJ = 10³ J

So,

$Delta H^0_{vap}=55500\ J/mol$

$\Delta S^0_{vap}=148\ J/K.mol$

So, temperature is :

$T=\frac{Delta H^0_{vap}}{\Delta S^0_{vap}}$

$T=\frac{55500}{148}$

3 0

4 years ago

Ca + HCl -> CaCl2 + H2 Li + H2O -> LiOH + H2 NH3 + O2 -> NO + H2O K + O2 -> K2O

jonny [76]

Answer:

Are you trolling us?

Explanation:

5 0

3 years ago

Read 2 more answers

Thermal energy _____ as temperature increases

Romashka-Z-Leto [24]

A. increases

As the temperature increases, the average kinetic energy of the particles in an object will increase. If the temperature of an object doesn't change, the thermal energy will increase as the mass of the object increases.

hope this helps <3

5 0

3 years ago

If you are calculating the grams to mL ratio, you are trying to find the object’s…

Alex

Answer:

Density

Explanation:

The ratio of mass to the volume of an object is called its density. Unit of mass is grams and that of volume is mL.

Density = mass/volume

$\text{Density}=\dfrac{\text{grams}}{\text{mL}}\\\\=\text{grams/mL}$

If you are calculating the grams to mL ratio, it means that we are trying to find the object's density.

4 0

3 years ago