Evaluate the amount of heat transferred and reacts

Assignment Help Chemistry

Reference no: EM13334097

Problem 1 - Energy, q, w, Enthalpy, and Stoichiometry Consider the following reaction: 2Mg(s)+O2(g)>>2MgO(s)?H = -1204kJ 1) Is this reaction exothermic or endothermic? 2) Calculate the amount of heat transferred when 2.5 g of Mg(s) reacts at constant pressure. Express your answer using two significant figures. 3)How many grams of MgO are produced during an enthalpy change of -97.0 kJ ? 4)How many kilojoules of heat are absorbed when 7.90 g of MgO(s) is decomposed into Mg(s) and O2(g) at constant pressure?

Reference no: EM13334097

Questions Cloud

Find the maximum speed of each mass : Two identical 1.60kg masses are pressed against opposite ends of a spring of force constant 1.60N/cm, Find the maximum speed of each mass when it has moved free of the spring on a smooth, horizontal lab table

What would be the percentage change in the price of bonds : Both Bond Bill and Bond Ted have 10 percent coupons, make semiannual payments, and are priced at par value. Bond Bill has 3 years to maturity, whereas Bond Ted has 20 years to maturity.

Human hemoglobin subunit alpha : Find the protein sequences: human hemoglobin subunit alpha

Find how far does the cat move in relation to the pond : A cat stands on a board of wood in a frozen frictionless pond. The mass of the cat is 4.0 kg, and the mass of the board is 3.0 kg. how far does the cat move in relation to the pond

Evaluate the amount of heat transferred and reacts : Calculate the amount of heat transferred when 2.5 g of Mg(s) reacts at constant pressure. Express your answer using two significant figures

Describe how this genetic information results in formation : 1. Begin with the information in DNA, a specific gene. Describe how this genetic information results in the formation of a protein.

What is the new accelration of the system : Assuming frictionless conditions, a table has a hanging mass, m1, over a pulley at the left side and another hanging mass, If m1 = .45kg, & m2 = .3kg, & m3 = .25kg what is the new accelration of the system

Find what must the coupon rate be on mertons bonds : Merton Enterprises has bonds on the market making annual payments, with 14 years to maturity, and selling for $972. At this price, the bonds yield 8.4 percent.

Explain reaction spontaneous at standard conditions : At what temperatures is this reaction spontaneous at standard conditions. Assume that ?H° and ?S° do not depend on temperature.

User Account

All Pages