Question

an exothermic reaction causes the surroundings to
answer:
a warm up.
b become acidic.
c condense.
d decrease in temperature.
e release co2.

Explanation:

An exothermic reaction releases heat. When heat is released, the surroundings absorb this heat. Absorbing heat leads to an increase in temperature of the surroundings, which means the surroundings warm up. Options B (becoming acidic) is related to acid - base reactions, not exothermic reactions in general. Option C (condense) is about phase changes (gas to liquid) which is not directly related to the heat release in an exothermic reaction. Option D (decrease in temperature) is the opposite of what happens in an exothermic reaction (endothermic reactions cause a decrease in temperature of the surroundings as they absorb heat). Option E (release CO2) is specific to reactions that produce CO2, not a general property of exothermic reactions.

Answer:

A. warm up.