If the value for q is +450 j, what can you conclude about a process? a) it is endothermic and the temperature increased b) it is endothermic and the temperature decreased c) it is exothermic and the temperature increased d) it is exothermic and the temperature decreased

Answer : The correct option is, (B) it is endothermic and the temperature decreased.

Explanation :

Endothermic reaction : It is defined as the chemical reaction in which the energy is absorbed from the surrounding.

In the endothermic reaction, the energy of reactant are less than the energy of product.

During endothermic reaction, initially the temperature of the reaction is high because initially amount of heat is given to the system and after the reaction, the temperature of the reaction is low.

Exothermic reaction : It is defined as the chemical reaction in which the energy is released into the surrounding.

In the exothermic reaction, the energy of reactant are more than the energy of product.

During exothermic reaction, initially the temperature of the reaction is low because initially there is no heat is given to the system and after the reaction, the temperature of the reaction is high because after the reaction, more amount of energy is released.

As per question, the value of 'q' is +450 J that means the heat gained from the surrounding. So, it is an endothermic process. And the overall temperature is decreased.

Hence, correct option is, (B) it is endothermic and the temperature decreased.

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in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

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