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Chemistry

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Abdullah Schuster

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Cards in this guide (14)
What is specific heat capacity

specific heat capacity of a substance is defined as the QUANITY OF HEAT REQUIRED to raise the temperature of 1 Kg of the substance through 1K ( kelvin ) .

however it obtained the unit of J/kg/k

The specific heat capacity is the energy required to raise the temperature of 1 kg of material by 1 degree Celsius.

_____________________

Apex: The energy needed to change the temperature of a substance The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

A cat with two kittens are sleeping or A cat with two kittens is sleeping.

'with two kittens' describe the cat. So, you should write 'is sleeping'. But if you mean that all three of them are sleeping, write 'A cat and his two kittens are sleeping'.

How does temperature affect the spontaneity of a reaction

if H and S have the same sign the temperature will determine spontaneity

What would cause entropy to increase in a reaction

The products becoming more spread out.

What does it mean for heat to be transferred by convection

Energy is transferred through moving currents of warmer air or liquid.

How does the ocean affect coastal climate

the specific heat keeps the ocean temperatures more even

How many degrees will 340 J raise the temperature of 6.8 g of water

12oC

How much energy is required to melt 1.5 kg of lead

36.8 kj

What is the value for G at 300 K if H 27 kJmol and S 0.09 kJmolK

G = 0 kJ/mol

How much energy is required to raise the temperature of 2kg of iron from 20 C to 23 C

(Explanation): remember to convert the 2kg to grams, then multiply in this equation Q=(2000)(0.45)(3) to get Q=2700J

Which of the following best describes H2 g Cl2 g 2HCl g H 184.6 kJ mol

The reaction produces heat.

What can be said about a reaction with H 620 kJmol and S -0.46 kJ molK

it can never be spontanious

What phase has the lowest entropy

solid-apex

What volume of water can be boiled by 3 kJ of energy

1.3 ml

(Apex's answer)

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