Which of the following has a positive enthalpy without a temperature change?

condensing gas

evaporating a liquid

cooling a solid

cooling a liquid

3. The ideal gas law allows you to calculate which quantity that is not possible in Boyle's or Charles' law? a. volume b. pressure c. temperature d. number of moles

How much heat is needed to raise the temperature of 50.0 g of water from 4.5 ⁰C to 83.0 ⁰C?

Com relaçao a pilha mg/mg2+//cu2+/cu, indique A:o polo positivo B:o anodo C:a reação global

When Group 1 elements form ions, they?

Salty snacks like peanuts and pretzels can often be found for free at gatherings where beverages are for sale. Vendors hope that the salty snacks will make consumers thirsty so they will purchase something to drink. Why does this work

Nonmetal oxides can react with water to form acids. For example, carbon dioxide reacts with water to form carbonic acid: CO2 H2O H2CO3. (1) Write an equation to show how diiodine pentaoxide reacts with water to form an acid. Do not include states.

If atmospheric pressure suddenly changes from 1.00 atm to 0.892 atm at 298 k, how much oxygen will be released from 4.40 l of water in an unsealed container?

Determine the molecular formula for the unknown if the molecular mass is 60.0 amu and the empirical formula is ch2o.

Draw the organic product of the following nucleophilic reaction

How does the energy of the activated complex compare with the energies of reactants and products? select one: a. it is lower than the energy of both reactants and products. b.