6-7 Which statement is true of the internal energy of a system and its surroundi

Question

6-7 Which statement is true of the internal energy of a system and its surroundings during an energy exchange with a negative Delta E(sys). The internal energy of the system increases and the internal energy of the surroundings increases. The internal energy of the system decreases and the internal energy of the surroundings increases. The internal energy of the system decreases and the internal energy of the surroundings decreases. The internal energy of the system increases and the internal energy of the surroundings decreases. Suppose 0.562 g of graphite is placed in calorimeter with an excess of oxygen at 25.00 degree C. The equation is C(graphite) + O_2(g) rightarrow CO_2(g) The temperature rises from 250.00 degree C to 25.89 degree C. The heat capacity of the calorimeter is 27.7 kj/degree C. What is Delta H in kj/mol for the reaction? -18.4kj/mol -3.93 times 10^2 kj/mol -32.7 kj.mol 2.93 times 10^3 kj/mol Find Delta G degree for the following reaction 2A + B right

Explanation / Answer

6)
The reaction 2A + B --> 2C can be written as
A ---> B -
C ----> 2B +
A ---> C

so,
G = 128 - 455 - 235
= -562 KJ

Answer: D

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