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Dmitry_Shevchenko [17]
3 years ago
8

PLEASE CHECK MY ANSWERS I REALLY NEED HELP!!!!!

Chemistry
2 answers:
Vlad1618 [11]3 years ago
8 0

Answer:

Explanation:

Heat and temperature are not the same thing. They possess different unit. So statement is false.

Molecular motion depends upon temperature . It increases with temperature. So statement is false.

Radiation excites the motion of water molecules in the food raising their kinetic energy . Water molecules being polar in nature vibrates strongly under the influence of changing electric field of em waves..

When Δ H is negative , heat is evolved so statement is false.

Due to exothermic process , heat is evolved . So statement is true.

Endothermic process indicates that thermal energy is absorbed by the system.

The unit of specific heat is J/mol.C. So statement is false.

change in temperature = heat/(mass.specific heat) = 368/2.23 x 11.2 =14.73 degree C.

From the formula above , heat absorbed = 2.91 x 10.4 x 26 = 786.86 J or 790 J

Calorimeter operates on the principle of heat absorbed  is equal to heat released

yan [13]3 years ago
3 0

Q9 7.9 x 10−1 kJ

Q10 The amount of heat transferred is independent of the mass of the sample being studied.  

just took the test

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